Bruce Springsteen and Little Steven, before Paul McCartney joined them on stage Saturday. (Jim Dyson/Getty Images)

“When I’m jamming with McCartney don’t bug me!”

Steven Van Zandt, Bruce Springsteen’s guitarist, in a Twitter rant blasting London authorities for pulling the plug on the band’s microphones Saturday night after their Hyde Park concert ran past a sound curfew when Paul McCartney joined them on stage to sing a couple Beatles’ hits.

Read more: Springsteen, McCartney silenced after defying curfew at London’s Hyde Park