What was the funniest typo you ever saw?

Oh gosh - of course I can't think of any at the moment, go figure, although I know I've seen some before. One thing that comes to mind, is I work in an office, and our company does work for a Public Safety building. When addressing things to them, I'm always paranoid I'm gonna type Pubic Safety instead! LOL Hasn't happened yet, but I always worry about it. Don't want to be on the other end of a funny typo like that!