Personally I’d say cave diving. I was contemplating between that and free climbing soloing but I honestly rather fall to my death than drown in a claustrophobic, dark, cold, silted up cave.
Anything with an internal combustion engine. Fuck that
What about it, for curiosity’s sake? Is it the fumes? The crazyness of literally going so fast as to barely retain control in tons of metal? Or for things like motorbikes, doing all that without tons of metal for a modicum of protection? lol
I love motorsports, but no matter the power source, the extreme stuff kinda’ takes having a screw or two loose…
It boils down to hating interior combustion engines and being constantly exposed to their nuisances as a pedestrian, cyclist and kayakist.
So… things not actually restricted to internal combustion engines? That sounds… rather petty and foolish.