How is this not an illegal block in the back by the FB on the FS?
http://www.goallineblitz.com/game/replay.pl?game_id=2237093&pbp_id=1962643&flash=1
http://www.goallineblitz.com/game/replay.pl?game_id=2237093&pbp_id=1962643&flash=1

Maybe reverse front side block in the front?