It's that post-audio time of year again, isn't it? I just got a lesson in this myself, from an ex-NFL player in a walla group. Apparently, real football players don't say 'hike.' The QB calls the play in the huddle, and says it'll be, say, 'on four.' Then everyone yells 'Break!' in unison (while holding hands, but you won't need sfx for that). Then, at the line of scrimmage, the QB hollers something like 'Down... set... hut! hut! hut! hut!' On the fourth 'hut,' chaos ensues. Any real football players (which I'm so not) out there feel free to chime in.