Fender Finder

If you find a ten dollar bill under the wiper of someone else's car - would it be stealing to take it?

I found a penny on the fender of a Graffiti Truck today at Union Square (It was a truck from the Bread Alone fleet parked where the Green Market takes place on Mon, Wed, Fri, and Sat). I'm pretty sure the owners would thank me for garbage collection if they knew I took the penny, but I'd like to know how it ended up there. I found another penny under the same fender.

Total haul today = .02

TOTAL to date = $16.47