Did you guys hear about the Ajax vs AZ match?
In like the 30th minute, a fan attacked the AZ keeper, who in turned kicked the supporter twice before groundstaff arrived. The keeper was subsequently red-carded, & AZ players responded by walking off the pitch & the match was suspended (waiting to hear what the league will rule-- Ajax was leading 1-0).
video included:
Ajax apologise for fan attack at AZ Alkmaar - ESPN Soccernet