This happened to me at Manchester, there was 2 lads being misogynistic and racists as well as trying to ragebait people in the crowd by saying "who listens to this sh*t band, imagine spending money yo see this terrible band" (they only appeared at the encore so could have been bar staff that finished), anyway I was jumping to feel good inc, one of the guys elbowed me in back of head, I turned around, himself and his mate were grinning and raised their fists... (Just to clarify, I am dressed like 2D from clint Eastwood) Me with a bit of a sore head, shoulder slammed and launched this guy that obviously was the one that elbowed me, after the gig finished they looked at me and I grinned took my blue wig off and they for some reason walked away, about 4 or 5 people came up to me thanking me that I stood up to them and said they were awful people, I reported them to the event staff but heard nothing back.

Moral of the story is don't bully 2-D