Ghosts with shopping carts
I saw a smarmy boss that I worked for about 15 years ago at the supermarket last night. This guy came into the company that I was working for and got rid of everyone that he didn't like and eventually, one of those people was me (he fired my VP, so everyone working under him went as well). This man was responsible for turning me into the jaded, untrusting, and pesimistic employee that I am today. He taught me that know matter how well you do your job, or how happy you are to do it, someone can always just come in and fire you for no good reason. He burst my good-employee-work-ethic-give-100%-like-your-folks-taught-you bubble. Fortunately, he was as stupid as he was arrogant and made a mistake on my leaving papers that allowed me to sue the company for unjust dismissal and win. Didn't bring back happy-worker Dina though.
I didn't walk over and talk to him, he probably wouldn't have remembered me, and it's always embarassing when an arch-nemesis doesn't remember you.