It happened at a show in Connecticut after one guy threw a water bottle at him.
“That was you? You think you funny?” asked Pump. “Come up here and do that shit pussy.”
From there, the Florida rapper threw his microphone at the bottle tosser, and then security took him off stage. You can also see a guy who looks like one of Pump’s boys jump into the crowd and start throwing haymakers at him. Pump never returned to the stage after that and the concert was over.
Why do you think someone would spend their money on a ticket just to go and throw something on stage? You can see the incident below from two different angles. You can also see Pump talk about it.