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

Yeah so there's a door to door salesman, he knocks on the door and a kid answers. The kud is wearing swim fins and a daiper and holding a martini. So the salesman says, "Hey kid! Are your parents home?" And the kid says, "what do you fucking think?"

in our band, coincidentally enough, we hired some dude to play drums day of, but he actually did know how to play and learned his parts on the fly. he was the guitarist for the other band.

no diaper though

See, the daiper is key. Part of it was, the kid had a look and a vibe a little bit like the "disco sucks" kid from that 70's show, i knew he'd be down to play some classic rock. Probably why i didn't tell him we were going to do it badly.

That is a funny coincidence tho

Some guy in a wolf costume repeatedly invaded the stage and hijacked His Name is Alive's set at Bowery Ballroom, I think Psychic TV was the headliner. Each time, he grabbed the mic and took over as the frontperson, doing (apparently) his own material, and the band seemed happy enough to back him. Until security violently removed him from the stage, only for him to return minutes later. HNIA must have been in on it.

At one point he was going around asking everyone in the audience their age, and whatever number they said, he would announce "that's much too young, you're going to die!!"
Only part i remember

this is the best live music story i've ever heard

All gigs should be like that. Why aren't all gigs like that

-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).

-the famous Lars-less Metallica gig is also the opposite of this, where everyone got to live out the thought experiment of 'what if Metallica had a different drummer?'. Would have been amazing if Dave Lombardo had done the whole show.

-I have seen wack horn players sit in with New Orleans brass band countless times, but they generally can't do too much damage since there are enough people covering the parts for real.

feel like the next step is for Metallica to have a Metallica-less gig

four random dudes show up at show time and start playing, at various skill levels

That's arguably a description of the first Last Exit show.

...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.