Odds of a tree falling on you?

It depends on several factors: where you live, the number of trees surrounding where you live, what your do for a living (lumberjack vs. neurosurgeon), even what you do in your leisure time can skew the results.

Personally, I've been alive for fifty years, and have never had a tree fall on me, or even near me (that I didn't cut down myself and know pretty much where it was going to land). You're probably pretty safe.