I run the defense so I can't see the Wrs build but, wow. I am guessing it is first step kicking in but really do not know.
http://goallineblitz.com/game/replay.pl?game_id=1097519&pbp_id=19171850
http://goallineblitz.com/game/replay.pl?game_id=1097519&pbp_id=19171850