Crystal Castles singer Alice Glass is known for her provocative live performances. This fan-shot video highlights an altercation that took place between Glass and security guards at the Sonar Festival in Barcelona this weekend, which almost ends with the singer meting out justice with a big bass drum.

Glass is pulled out of the audience by security guards and lies motionless on the floor for a few seconds before reaching for the drum kit. The fight is then dragged off-stage after Glass’s band mate Ethan Kath joins in the fracas. Little Boots singer Victoria Hesketh witnessed the incident, and tweeted:

“Woah just watched Crystal Castles at sonar, sound was awful throughout kept cutting out so at te end alice started trashing the stage…then the sound guy tried to rugby tackle her so ethan jumped out and punched him! Massive!” Hesketh later amended her report: “Okay just spoke to alice apparently it was her who socked him one ha ha.”

[Gigwise]