It was Christmas Eve when my mother called AAA. She ran over something on the way to my apartment that messed-up her tire and rim. The AAA guy arrived just as my brother and I finished changing the tire. I think the AAA guy put some air in the replacement tire or did something minor (I have a terrible memory). My mother is an idiot and didn't seem to understand that the guy dropped whatever he was doing with his family on Christmas Eve to answer the call (his young son was in the cab of his truck), so we had better give him a generous tip. I don't remember the exact amount, but I gave him at least $20.