My latest big hobby has been Historical European Martial Arts (HEMA), basically medieval sword fighting. It's a great workout for mind and body and is filled with nerds into swords and the history of it haha
Also big into swing dancing, ultimate frisbee, and board/video gaming
I once hiked Longs Peak in Colorado. It's an intense hike and has had a lot of people die on it over the years (quick search comes up with ~70 people). It took me and my friends about 12 hours to get up and back down.
Anyway, I was younger and dumber and wore my normal street shoes, which happened to have almost no grip left on them. I vividly remember a portion of the hike near the end where you came up to a ledge (overlooking vast nothingness), you turned to your left and climbed up a 45 degree rock slope. If I had lost my grip on that ledge, I would've tumbled down and out into space. I had lost my grip with my shoes multiple times that day before that last section.
I obviously didn't slip or otherwise die that day, but I think about it pretty often. In a multiverse scenario, I figure quite a few of my parallel selves were lost that day haha