So in the latest patreon episode of ideotv, they mention an acapella straight edge hardcore group called Jud Jud. My immediate reaction was, of course, to look them up. I found them on spotify and figured since my afternoon at work was mostly data entry, I'd plug an earphone in and give them a try. I was pretty disappointed, I have to say. They weren't really doing much and weren't even especially good at it.
About an hour later I left work and, not needing to be available, I plugged the other earphone in on my way home, and oh boy it turns out there's a whole other guy in the other ear filling in all the gaps and keeping perfect timing and making all sorts of other cool sounds.
Moral of the story is, I'm pretty dumb and Jud Jud is pretty rad.