You could make the argument that Queen's "Bohemian Rhapsody" is the zenith of sing-a-long rock anthems. And if you made that argument, it's highly unlikely that you would find too many dissenters. Simply put, if you're a band and you want to learn one cover song to pump up your crowd, you probably won't go wrong with Freddie Mercury's crowning achievement.
It appears The Protomen understand this, as they proceeded to put on a stellar performance of the song at a CD release party at the Exit/In club in Nashville, Tennessee. If you've never heard of The Protomen, they're an American band that has gained a bit of a cult/internet following based on their concept albums and rock operas centered around video games (notably Mega Man).
This particular performance is special because, as the story goes, Tenacious D frontman Jack Black happened to be hanging out at the show. And about three minutes into their impressive Bohemian Rhapsody rendition, The Protomen called Black on stage to help sing back-up vocals.
As you can see, he gets pretty into it - enough so to destroy his microphone stand:
From the looks of some of the fans, the surprise appearance was quite the treat.
Impressive performance, all around. But I'm still not sure that it matches the intensity of my favorite Queen cover artist: