question: how do skydivers breath while free-falling when wind is blowing against their face?
comment: They aren't going that much faster than riders are on a motorbike. The lungs can generate plenty of pressure to overcome the Bernoulli effect.
passages: When a skysurfer is filmed by another skydiver falling alongside them, the resulting film gives the appearance that the skysurfer is riding on the air in the same way a surfer rides on a wave. The downward motion is not very apparent and this creates the illusion that a skysurfer is gliding on air currents like a sailplane or hang glider. In fact a skysurfer always falls at a high speed comparable to any other freefalling parachutist. The competitive discipline of skysurfing is a team sport consisting of a skysurfer and a camera flyer with a video camera.
  
  Section::::History.
   Wind shear or wind gradients are a threat to parachutists, particularly to BASE jumping and wingsuit flying. Skydivers have been pushed off of their course by sudden shifts in wind direction and speed, and have collided with bridges, cliffsides, trees, other skydivers, the ground, and other obstacles. Skydivers routinely make adjustments to the position of their open canopies to compensate for changes in direction while making landings to prevent accidents such as canopy collisions and canopy inversion.
  
  Section::::Vertical component.:Planetary boundary layer.:Effects on flight.:Soaring.
   Freeflying is also a form of skydiving using a variety of body positions, such as head-down or feet-to-earth, while still building formations with others. These evolutions in skydiving have taken the sport further away from the traditional image of a daredevil stunt.
   Skydive (Transformers)
  
  Skydive was the name of five fictional characters in the Transformers series.
  
  Section::::Transformers: Generation 1.
  
  Skydive was part of the Aerialbot team able to form a limb of the combined robot Superion.
   Zipser started skydiving in the experimental phase of the Accelerated Freefall progression skydiving program in 1986, and immediately began experimenting with non-traditional forms of body flight. He studied and trained human aerodynamics for four months in a wind tunnel. From that experience he developed a new concept of human body flight, which he called FreeFly. First he trained friends, then he developed a professional FreeFly Training and Instruction Program so he could train others to become FreeFly teachers and instructors. 
  
  Section::::The First School of Modern SkyFlying.
  
  Main article The First School of Modern SkyFlying
   Skysurfing is a skill undertaken by qualified, experienced skydivers, requiring specific training before undertaking and practice to ensure safety. A neutral position maintaining stability is to stand upright on the board during freefall, this is also the position required for deployment of the main parachute whilst surfing on medium and expert boards. 
   BULLET::::- ""'Generation 1" Predator Skydive (1992)
  
  Section::::Beast Machines.
  
  After six years, the name Skydive was reused on a deluxe Maximal Pterodactyl; however he was not part of the Dinobot sub-group. Skydive did not appear in the animated series.
   The extra drag of the board tends to upset the balance and make the skydiver flip over. The jumper must also learn to control the board and their body position so as to open the parachute in a stable configuration. More advanced aerobatics such as loops, rolls and helicopter spins, are more difficult still and are tackled once the basics have been mastered. Since some techniques require constant spinning at a high speed, one technique some skysurfers take to is tightly wrapping ace bandages all the way up the arms and legs to keep the blood from pooling at the end of your limbs. Even with the bandage technique, however, many techniques in skysurfing can be extremely painful. 
   Bodyflight is accomplished via increasing/decreasing the drag of your body, using arms and legs as rudders for bodyflight motion control, as well as other techniques similar to that of an airplane. Professional athletes who fly through the air for long distances, such as ski jumping, have also used certain bodyflight techniques to increase jumping distance by manipulating their bodies to be more airfoil-like. Frequent visitors to a vertical wind tunnel are often called 'tunnel rats', much like frequent visitors to ski slopes are called 'ski bums'. Some body flying enthusiasts develop their tunnel-flying skills not for sky diving training, but in order to be able to give professional performances.
   To the Vehicons, Skydive is the true menace of the skies above Cybertron. Speed and maneuverability are umatched within the Maximal ranks; makes him an impossible target. Reinforced, specialized alloys offer maximum protection if any Vehicons manage to get a lock. Wings act as energy receptors, supplying incredible endurance - always outlasts opponents. Despite stoic personality, Skydive takes great pleasure in "buzzing" secret Maximal outposts.
  
  Section::::Beast Machines.:3H Enterprises.
   Freeflying
  
  Freeflying is a skydiving discipline which began in the late 1980s, involving freefalling in various vertical orientations, as opposed to the traditional "belly-to-earth" orientation. The discipline is known to have originated when Olav Zipser began experimenting with non-traditional forms of bodyflight. Zipser founded the FreeFly Clowns as a two-person competitive team with Mike Vail in 1992, and was joined by Omar Alhegelan (1st ever FAI Freestyle World Cup & World Champion), Charles Bryan, and Stefania Martinengo in 1994. The FreeFly Clowns are also credited with opening the first school to teach freeflying, The First School of Modern SkyFlying.
   There have however been multiple recorded instances of skydivers jumping without being attached to a parachute. However these jumps lack the element that make them a banzai skydive, where a parachute is thrown out of the plane then caught by the jumper after some delay. During skydives where the jumper is detached from the skydiving rig the rig is held by the skydiver or an assistant until the skydiver is secured to the rig. This is due to the skydiving rig having a much slower terminal velocity than a skydiver is capable of achieving. This has led the skydiving community to doubt the idea that banzai skydiving has ever occurred as defined.
   Skyrunning also calls for some techniques. Although those experienced runners usually have faster speed and stronger duration, they are quite wise in controlling the speed and be careful in developing the strategy for their speeds. For instance, experience runners intend to be slower in uphill trails, but faster in downhill trails. They usually develop specific gestures to make the move more flexible and cost less energy. The upper bodies are usually relaxed to maintain balance, and repeated practices are required for one to develop strong skills for skyrunning.  
  
  Section::::World Championships.
   At , the walk was the highest of Wallenda's career, about seven times as high as the Niagara crossing. He covered a distance of approximately in 22 minutes, 54 seconds, using wire. He carried a balancing pole weighing . Wallenda said it was important for him to vary his pace throughout the walk to prevent resonance effects. Terry and Mike Troffer were his safety coordinator and chief engineer, respectively, for the event.
   When exiting from a forward-moving aircraft (as distinguished from a hovering aircraft, such as a balloon or a helicopter in hover mode) during a normal belly-to-earth skydive, the skydiver must arch his body in the direction of travel which is initially horizontal. If the skydiver continues to arch, his belly will gradually alter pitch until he is belly-to-earth. This section of the jump is commonly referred to as "the hill".
  
  Relative wind differs from the wind in meteorology in that the object ("e.g..", the skydiver) moves past the air, as opposed to the air moving past the object.
   Freestyle skydiving
  
  Freestyle skydiving is a competitive skydiving discipline where one member of a two-person team performs acrobatic manoeuvres in free fall while the other one films the performance from a close distance using a helmet-mounted camera.
  
  Section::::History.
   This is freestyle skydiving, set to music. Recently demonstrated at Wind Games 2016 by international competitors such as Leonid Volkov (Russian) taking gold, Maja Kuszynska (Poland) taking Silver and Guillaume Boileau (Canadian) taking bronze. Although the movements appear fluid and effortless, they require great strength and control. The competitions consist of low and high speed flow which means competitors can execute very different moves in the wind flow. The routines include gymnastic moves, balletic type Ts, somersaults, twists and splits. 
   The Grand Canyon area has played host to a number of high-profile stunts and daredevil feats. In 1922, Royal Thomas flew a Lincoln Stanard biplane into Grand Canyon National Park, landing just from the Canyon's edge. The park did not yet have stunting regulations and the feat was approved by park superintendent Walter Crosby. In 1980, stuntman Dar Robinson drove a sportscar over the canyon's edge, parachuting out of the car as it fell. He did the stunt in Hualapai Indian Reservation after being denied a permit by the National Park. In 1999, daredevil Robbie Knievel jumped a narrow portion of canyon in Hualapai territory on a motorcycle, breaking his own world record for longest jump in the process. The event aired live on Fox News. In 2006, Bob Burnquist skateboarded off a ramp into the canyon, descending to the bottom with a parachute. In 2011, Yves "Jetman" Rossy used a custom made jet suit to glide above the Hualapai reservation for eight minutes. He covered a distance of before parachuting into the canyon.
   The example of a falling skydiver who has not yet deployed a parachute is not considered free fall from a physics perspective, since he experiences a drag force that equals his weight once he has achieved terminal velocity (see below). However, the term "free fall skydiving" is commonly used to describe this case in everyday speech, and in the skydiving community. It is not clear, though, whether the more recent sport of wingsuit flying fits under the definition of free fall skydiving.
   Due to the increased freefall speed and potentially faster horizontal speeds, freeflying has dangers beyond that of a normal skydive. Extra care must be taken for freefall skydive groups to stay away from belly-to-earth skydivers to avoid collisions. Since most parachutes are not designed to be opened at speeds higher than that of normal belly flying, freeflyers must transition back to the "belly to earth" position and slow down their descent for several seconds before deploying their parachute.
  
  While freeflying is a younger and more extreme addition to skydiving, it is becoming a popular event in competitions and world records.
   The term "free fall" is often used more loosely than in the strict sense defined above. Thus, falling through an atmosphere without a deployed parachute, or lifting device, is also often referred to as "free fall". The aerodynamic drag forces in such situations prevent them from producing full weightlessness, and thus a skydiver's "free fall" after reaching terminal velocity produces the sensation of the body's weight being supported on a cushion of air.
  
  Section::::History.
   Freeflying is an expansion of skydiving which includes the traditional belly-to-earth positions, but extends into vertical flight where the flyer is in an upright position (falling feet first) or in an inverted position (falling head first). These positions increase freefall speeds and make new types of formations and routines possible.
   Skysurfing was invented by two French skydivers, Dominique Jacquet and Jean-Pascal Oron in 1986 but it became popular and gained recognition during the 1990s thanks to the efforts of the first few exponents to master the more complex aerobatics, such as the late Patrick de Gayardon and the late Jerry Loftis. The rise of skysurfing coincided with other new-age disciplines in skydiving, such as freestyle and freeflying. Freestyle skydiving is a balletic, mostly individual style which seeks to extend the sport beyond the traditional belly-to-earth flat position used by most skydivers who make formations with their bodies.
   For flying a sit, the feet are oriented toward the relative wind and 90-degree bends maintained at the knees, hips, and shoulders. To move around, the flyer redirects the airflow in the opposite direction the jumper wants to go. Newtonian mechanics then push the flyer in the desired direction. Fall rate changes (descending faster or slower) can also be made.
  
  Section::::Explanation.:Head down.
   Skydive would rather read about jet fighters than be one, and is fascinated by the science of aerial warfare. He can, within the limits of his design, duplicate the flying motion of anything he sees and might be the most skilled flyer of all Transformers. He flies at Mach 2.6, with a range of 1400 miles. Skydive carries laser guided missiles and uses a nega-gun that crumbles objects by breaking molecular bonds. He is prone to mid-air stalls. Along with his fellow Aerialbots, he forms Superion.
  
  Section::::Transformers: Generation 1.:Marvel Comics.
  
presuppositions: It is impossible for a skydiver to breath when they are falling at a high speed. 
corrections: The speed the skydivers fall at is equivalent to a motorcycle rider, and the lungs generate plenty of pressure to breath during the fall. 
raw_presuppositions: It is impossible for a skydiver to breath when they are falling at a high speed.  Wind blowing against a skydiver's face makes it hard for them to breathe.
raw_corrections: The speed the skydivers fall at is equivalent to a motorcycle rider, and the lungs generate plenty of pressure to breath during the fall.  The lungs generate plenty of pressure to overcome wind that blows against a skydiver's face.