To be fair to Collum, I can see why he gave the McManus decision. I'm not saying it was the correct one but there is movement from his hand to ball even though he doesn't touch the ball with his hand. Without the luxury of TV replay, watching that incident in real time it's pretty easy to see why he gave it.
He's still an odious wee creep but I think folk were looking for him to make a big mistake this game. This was an easy mistake to make...