Can a pawn that performed an en passant capture promote at all? So let's say I capture en passant with a pawn. Using the same pawn, I get to the 8th rank. Can I promote that pawn into anything else? I've heard of this restriction in various ways. Some say it can become a rook at best, and some say it just stays as a pawn, but it moves backwards. 

Please let me know if this is a classic case of "I'm losing better make some stuff," or an actual rule.
From FIDE rules (3.7 e): 


  When a pawn reaches the rank furthest from its starting position it must be exchanged as part of the same move on the same square for a new queen, rook, bishop or knight of the same colour. The player’s choice is not restricted to pieces that have been captured previously. This exchange of a pawn for another piece is called ‘promotion’ and the effect of the new piece is immediate.


There is no restrictions whatsoever about capturing en passant.