It was a very slight touch of his forearm against the player as he was rising from the floor. Lets be honest the player would have collapsed as if he had been shot if it was anything worse.
Some on OwlsTalk are just sore that that couldn't beat a 10 man side in the last half hour!
Stephens won't get retrospective action. If the ref had seen it he would have got a yellow. It was the over reaction and the head butt that got the Sheff Wed player sent off.