I think they would have over turned it personally. It's not like he struck him and we're arguing it wasn't that bad. He's genuinely given him a body bump and been sent off. You look at that twice and change it to yellow. The referee seemed to get caught up in the heat of the moment and overreact.
Its not a red for me but I'd be amazed they overturned it because its off the ball. Its not like the lad has made an enormous mistake or anything but it wasn't the smartest thing to do 5 yards from the ref.