We've all known at least one. Sometimes they can be fun, albeit tiresome, add some spice to your life, let you see the world from a kooky perspective:
"You're kidding. The driveway is radioactive again? Ok, ok, I'll wear the ziploc baggies on my shoes. I don't want you having to drink bleach again."
With others however, you'd do well to stay far far away.