I had that happen to me over the weekend. Except for it was the $$ kind of change and the old dude was a homeless man. He got mad because I gave him two pennies. OK, that was a bit mean I guess, but I was broke as shit myself and had just come off Bourbon Street in New Orleans and wasn't exactly sober. And when I say broke, I mean that I had about 83 cents on me, literally. We were waiting on a street car, and he cussed me for about half an hour from fifty feet away, yanked some pay phones off the hook, kicked over some trash cans, and took some kind of Kung Fu stance as he yelled for me to come throw down with him.