Heavy Metal Bros Steel Panther were playing a show, when all of a sudden a dude and his brother got the attention of the band. What happens next is the stuff out of most people's "fuck, I never should've woken up from this" dream:

Kamel playing Eyes of a Panther with Steel Panther @ House of Blues, Sunset Strip.It was awesome! I was NOT prepared for this song, I had no idea they were going to call me up onstage to make fun of me and my brother.

[H/T: Reddit]