From what I read about it the coach who stuck his knee out has been planning this. Every kick down the field he would get five other guys to stand there in an attempt to trip the other team. Some of the other staff said he has been doing this for a while. The NFL has reviewed tapes and confirmed that on kick off he would get four or five other guys to stand up at the line knowing players get pushed out and he would attempt to trip them.
This guy is a little off his rocker if you as me.