Plunger

I've done it. Hurled myself off the high-dive. Not sure what's below. Could be gorgeous blue waters. Could be the toilet. And sometimes it's hard to say which is better. Sharks could be in the gorgeous blue waters. I don't know what could be in the toilet that would be good, but it's conceivable. Odds are it'll just have been into the pool in my apartment building. No change or a familiar sort of screwed.

#9 of that which might go wrong: You could learn you're a talentless hack and have to reevaluate your path in life. And what a long night that'd be, hmm?