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.
slope skiiing
I can’t tell if you’re trying to say Alpine skiing is scary or that you’re into all the stuff people consider to be extreme sports.
I would gladly skydive; but strapping some dead trees to my feet and hurtling myself at high speed towards a bunch of live trees, as though taunting them, seems like a bad idea.