I can't believe any fan who follows football hasn't seen that happen a few times at least. It happens at all levels including the NFL, where their saving grace is they can get back up and run if no one touches them. Also, I blame Addai just as much. I the kick before that he got right into XC's face in the endzone so he couldn't run it out. On that one he nonchalantly stood on about the 2 or 3 yard line instead of going back in to the endzone and grabbing XC. That's what he's back there for.