[just another ref]

Originally Posted by mbyron

Provided that the ball carrier gets to the spot first and legally, why not? Airborne shooters have specific protections in the rules. Show me the section on "airborne blockers."

The player is allowed to come down, regardless of the reason he was airborne.
If the defender jumps in an attempt to block the shot, and has a line which would pass the shooter without contact, then the shooter jumps into this line, thus creating the contact, it is a PC foul.