If I catch a pass while jumping next to my sideline and land with one foot in and then step out of bounds, in the NFL, that's not a complete pass.
But what if I catch it on the one foot and then hop a few times -- while I have 1 foot in bounds, I take more than 1 step!
Is the rule about 2 (different) feet inbounds or 2 steps (the way a completed pass needs a step taken)? What if I were to keep hopping and move forward ten yards and then fall out of bounds (imagine a player who gets an ankle hurt while running a route and can't put the injured foot down) -- is that complete and in-bounds?
Taken to an extreme, can a one legged player ever complete a reception while standing? (if he kneels or sits, other body parts touch the ground and they substitute for the leg).
I'm not being silly here -- I have seen players catch a pass, land on one foot and then take a quick hop and THEN fall out of bounds (not in the NFL). I don't know if that would count as 2 feet in or not (the one foot lands twice after the completion).
(the one answer I got was that the catch would be complete but not legally in-bounds, making it both complete and incomplete at the same time)