Days before, Green Day played a set at Germany’s Hurricane Festival, where Armstrong chastised a fan for squirting him with a water gun. The band was performing their 2004 tune, “Jesus of Suburbia,” when the singer stopped mid-song and gave the crowd the middle finger. Armstrong then went upstage to confront the culprits.

“Good Riddance (Time Of Your Life)” is a typical set-closing song at Green Day concerts, and at a show in Luxembourg yesterday (June 30), the band again leaned on the 1997 hit to wrap up their performance. This time, though, they let a fan on stage to play the acoustic guitar, but he went rogue.