人摔了出去　人 is my body. Is it common? 不料，一天早晨，我骑自行车，被一个人撞倒，人摔了出去，左手骨折。

"Unexpectedly, One day in the morning, when I rode my bicycle,

I ran into a person and (I or my body) was thrown out of, my left hand was broken."

人 is used instead of "身体".

Why is  this expression used?

In Chinese, is "人"  often used for the meaning of "my body"?

In my feeling, "人" is used for the meaning of "human or person" , academically, 

philosophically, historically, literally, and so on.

It is not for the meaning of the particular someone or the particular body.

It is not concrete but abstractive.

So, I think "人摔了出去" should be changed to "我摔了出去" or "身体摔了出去".

"人" is commonly used for the meaning of "my body"?

I have no confidence if I can distinguish this meaning when I listen to "ren".

In this site,  "人" is very questioned but the meaning is "human or person".
According to dictionaries, 人 here means this sense:


  （人的身体或意识） state of 
  one's health; how one feels:
  
  When the patient was taken to hospital, he had already lost
  consciousness.
  
  送到医院，(他)人已经昏迷过去了。
  
  I haven't been feeling well for several days.
  
  这几天我人不大舒服。


In your context, it means the sense of one's body. It could be also referring to one's feelings/consciousness(see the above example).

It is a pretty common usage of 人. Let's say when I say 我人不太舒服, I might mean 我身体不太舒服, feeling vomiting, headache and etc.