I have the Lions vs. Cowboys game on Tivo and I watched it again. There was much ado made about a "snap trigger", and that maybe the Lions learned something about Al Johnson by watching film to get a jump on the ball. I don't believe it was anything pertaining to Al Johnson, and I do not believe there were any triggers. I just think the Lions were trying to get a jump on the ball by guessing at the snap count at all costs, even if this meant an offsides penalty. There were at least 5 instances where the Lions were offsides, but the refs didn't call it.
Ironically, the more offsides penalties the Lions racked up, the more rattled Drew Bledsoe looked, and partly because the refs weren't calling the penalty half the time. I watched these non calls in slow motion, and the Lions were clearly offsides on every single one of them.
I think this jumping of the snap count was just a gamble that the Lions took to get in Bledsoe's head and to keep him offtrack. It did work, but we won anyway...and 17 penalties (that counted) for the Lions is not a recipe for winning.