Green Day’s set at the iHeartRadio Music Festival in Las Vegas was cut in half last night so that the performer before them, Usher, could be given more time. That’s just the way things work and, although it’s not fair, it happens all the time at festivals, which are reliably unpredictable. No one told Billie Joe Armstrong, though. When a screen flashed that Green Day only had one minute left, he stopped “Basket Case” and went crazy.

WARNING: The following video contains offensive material

UPDATE: Green Day posted the following on their Facebook Wall Sunday afternoon:

“Billie Joe is seeking treatment for substance abuse. We would like everyone to know that our set was not cut short by Clear Channel and to apologize to those we offended at the iHeartRadio Festival in Las Vegas. We regretfully must postpone some of our upcoming promotional appearances.”

Click here to check out all the photos from their set!