2 Dollar Bill

I've carried a $2 bill for so long it's almost worn out. I was working really late one night at the shop and there was a knock on the door. There was a little elderly man there who had walked over from the post office parking lot. He had stopped there for some reason and now his old Rambler wouldn't start. I took my vehicle over and gave him a jump. He tried to pay me but I didn't want to charge him anything. So he said, 'here's a $2 bill for good luck" or something to that effect. I figured if I always carried it I would never be broke.
Dallas