nope, I think Suh had a cramp...when the TV zoomed in on him his leg was as tight as a strung rope....
also, when he was turned yelling his body was all twisted and that can disrupt the breathing enough to cause your legs to stiffen and get a cramp.
Remember that DT from OU a couple years ago was yelling at his team before the game to get psyched and then he just collapsed cuz he was all bent out of shape, literally?
Furthermore, I just don't think Suh can see way back there enough to pull off a cramp collapse, trust me, he's just worrying about him and his D-lineman more than whether Dennard is in position or not. Unless I saw some tape where he was looking and yelling a Dennard and then just drops, I believe he really had cramps.