I claim that we simply apply 6-3-2-a and by logic, award a touchback.
Now, if there are fouls on the play, it becomes interesting, as we obviously cannot apply 6-3-11 as that rule only applies to bats.
4th and 20 from B-40. Team A's punt bounces high into the air at the B-5. Gunner A22 dives towards the end zone in an attempt to get to the ball before it gets to the end zone. He lands face down in the end zone and the ball comes down, bouncing off his back, and then recovered by B20 who runs the ball to the B-13 where he is tackled. A57 held behind the neutral zone during the kick. Ruling ?