Snap hits the upright

[Reffing Rev.]

correct, if he kicks the pylon and stays out of bounds, no problem, if he never goes out of bounds except for hitting the pylon then he's out and back in almost instantaneously...or when the upright is on the endline like at a lot of smaller schools and the receiver crossing the back of the end zone brushes the post.

As was discussed in another thread ad nauseum...since there is no definition for an inbounds player only an out of bounds player then you cannot be simultaneously in and out because if youre out youre out. So the player standing in the back of the end zone who leans against the post or brushes the post or turns and the back of his foot kicks over a pylon has while standing "in bounds" gone out of bounds, and then when he stops touching said post or pylon, being no longer out of bounds is inbounds and if its an A player then he's "gone" out of bounds and "returned" which is illegal participation 15 yards.