Glad to hear you're alright. I strongly believe the existance of karma. I got my stepdad's bike stolen a few weeks ago when helping out at my ex's high school. I was pretty dissapointed considering it wasn't even mine. A week later, I found a bike for $3.00 at a garage sale that was in better working condition than the one I was using

.
Karma really had a large impact on me in high school. I wasn't too respected, and was going through a typical teenage angst phase. I didn't really didn't like many people, and people wouldn't like me either. I put an effort into being a better person, and was rewarded back. It's great if you take advantage of karma!
And about the money; if nobody was around, then the probablility of finding the owner of the money is pretty slim. One time my mom found $100.00 on the ground (and this was in the 60's), and she found the owner of it, and the owner of it gave her a $1.00 reward. I find it rude to give somebody such a small amount though. Just a "thank you" would seem to be more polite than $1.00