It actually wasn't a bad call. Read the rules. The rules clearly state that if there is ANY contact then it is the judgement of the referee to decide if the receiver was forced out. The receiver doesn't have to be pushed out. As long as there is contact it is a judgment by the referee. In this case the referee thought there was enough contact that he was forced out. Was it a bad call? No! It could have gone either way. Questionable? Yes, but not bad.