I went through a few years in my early 20s where every time I found out something bad (cat died, car accident, friend decided to get an abortion, laid off from job, etc)... I'd realize I had a $50 bill in my pocket/purse.
frick if I'll ever have one ever again.
I worked an opening night at a club a few years ago and each of us bartenders made $300 apiece. They gave me 6 $50s because they heard I didn't like 'em and they thought I wasn't serious. I left 'em sitting on the damn bar. One of the cocktail waitresses I was friends with saw what was up and changed them for me.