See, this sort of extreme activity for a thrill is something I approve of. Unlike mountain climbers here on Mt. Hood and other notable places, it doesn't involve people disrupting wilderness and forcing emergency crews to risk their own lives to save yours. Many argue that 'the risk is on the one who takes it, no one is obligated to come save them', but the reality is that when an emergency department gets a call... they often <b>have</b> to respond, if only to save face. <br>With this, it's a controlled environment that still has some degree of personal risk. One mistake on the way down while diving, and you're in for a rough hospital trip. But going headfirst down HAS to be a huge rush.