We know sports can be rough. That's why the majority of them adorn the players in protective gear, shin pads and helmets. You know who gets very little of that? The referees! These brave officials have to do their best to stay out of the way of the action, but that's not always the case. In fact, sometimes they are the target of aggression from the players, something you can't exactly defend against. So while we watch these rare and extreme cases of bold professionals putting their safety on the line to ensure safe, fair, and fun competition and play, we are also paying tribute in a way, to the dedication referees display to their jobs. Let's see what happens when referees get knocked out!