Danny DeVito Caught in a Topless Trance

4/26/2010 8:00 AM PDT

Danny DeVito at Coachella

65-year-old Danny DeVito rocked his entire face off at a techno-trance concert at the Coachella music festival -- fist pumpin' like crazy in a sea of crazed fans ... and topless people.

It all went down during the Deadmau5 show -- where Danny fist pumped like he was on an episode of "Jersey Shore" ... and the guys at Newestra.com caught it all on camera.

Just watch the damn video already -- it's awesome.