Hooray Ben! I'm so glad that had a happy ending, and there are great lessons in this about how to handle a crash... as in, no matter what the guy promises, you need to get the insurance info.
(No doubt this college kid wanted his parents not to find out, so he thought he could give Ben a couple of bills for his bike and be over with it. Drivers just don't get what our bikes are worth. So when they promise to take care of it, realize they think your bike came from Wal-Mart, and get the insurance info as a backup.)
I'm so glad you're ok, and it was amazingly lucky you didn't get hurt. It's also worth mentioning that you were wearing a ballistic BMX helmet, which did sustain an impact. Again with the helmet, yeah, yeah, I know. But you gotta do it.
And, hey, you even won first crash! Supercool that there was a prize for that.