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.
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.
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.