Has there ever been one of those "who wants to play the drums?" moments in a concert where the guy just trainwrecks?

...although they weren't playing Metallica songs.

-I remember seeing Common once, and he had a segment where he'd pull someone up from the crowd to freestyle with him. He brought up a little kid who was incredible, but I'm sure it must have backfired sometimes (although it's a good idea to choose a kid, because it's cute even if they choke).

i saw ghostface do a lazier version of this like 15 years ago, where he just invited people from the crowd to come up and rap on their own while he sat out, he may even have gone offstage. every one was terrible and it was like 20 minutes of his 45-minute set, felt like a ripoff.