I learned to always look into what I'm drinking before taking a drink outdoors. I nearly swallowed a HUGE hairy spider that was floating on top of my beer. A friend of mine was bitten on the lip by a bee that had crawled into his soda. His lips swelled up to cartoonish proportions. We had some great laughs at his expense.

Another thing I've learned: rain fly's dont keep out the rain when it's coming at you horizontally.