Refereeing is hard when you're possibly concussed, and definitely dazed. Just ask Chris Foy.
The referee was clocked in the head by a deflected shot on Saturday and had to come out of the match because of it.
Of course, that happened after a minute and Foy stayed on for more than a half-hour, but whatever. It's not like his health was endangered, or he was possibly incompetent referee. Play on!