I had a bat shit crazy boss once. Nice bat shit, not cunty bat shit.
He was ridiculously territorial over everything, couldn't use his bin/stapler/pens etc etc we all took great pleasure in filling up his bin or using all his staplers. A favourite was attaching all of the paper clips together.
My favourite prank ever though was because he used to hot foot it out of the building faster than you could say 5.30 - this meant he didn't have to do any of the checks before we left (taking up a whole extra 5 mins of time!!).
He legged it out of the building only to discover that some bastard me had relocated his car and left a map to its location. I did that at least twice whilst working there!!!
I'm amazed I never lost my job 