4/5, A-30, 7:00 (2), no score.
A12 legally punts the ball, but is run into by B39 on the shoulder, clearly and truly causing A12 to fall to the ground (but not endangering him). While the kick is in flight, A21 gets up, chases down, and slugs B39. B29 completes a fair catch at the B-30.
Ruling:
(As always, include game and play clock status.)
For Texas UIL guys, the ruling may be slightly different than pure NCAA. If so, clearly indicate either (or both).