I will never understand that possess people to go cave diving. Just the idea of crawling head first into a hole barely large enough for me to wiggle fills me with anxiety, and I'm not even claustrophobic. That poor bloke stuck in the nutty putty cave had one of the worst accidentals "natural" deaths I can think of, just below that fireman at Tchernobyl that basically melted alive after arriving just after the reactor explosion.