[KWH]

Guys-

1) He threw an illegal forward pass because it was, a pass after team possession had changed during a down! 7-5-2a

2) It is a safety because A player on offense comitted a foul for which the penalty is accepted and enforcment is from the endzone. 8-5-2c

3) It is NOT a touchback because A forward pass intercepted in B's end zone DID NOT become dead there in B's possession 8-5-3d