Ye 'ol Kicking Game

[JMN]

Here's one for you guys:

NFHS and NCAA. Tie game. Late in Q4. The crowd is louder than you've ever heard them. A has just tied the score at 28-28. As you line up for the kickoff, you're thinking ON-SIDE, ON-SIDE, ON-SIDE!

Sure enough, your dream comes true. K kicks the ball (from the A40)in the air. At the B45; A) A81 who is normally a =fast as the wind= wide receiver races downfield, catches the ball at the B45 (there was no B player in position to catch the ball) and proceeds to the end zone for an apparent touchdown, B) B44 waves the fair catch signal and catches the ball at the B45. He is then leveled by A59, fumbles the ball which is recovered by B22 and run down the sideline for an apparent touchdown, C)B13 is attempting to field the ball, but is knocked down by A15 who was blocked into him by B20. The ball glances off of B13 and is recovered by A89.

Whatcha got in each scenario? Consideration for penalties, rule applications, and your explanation to the coaches.