We interviewed this little old lady who had enjoyed herself a LOT in the 1960's. She seemed nice enough, so we hired her. We would send her out to do menial tasks that should take 10 minutes, and she would be gone for 2 hours. No one could find her, she wouldn't answer her phone, etc, etc. Invariably, she would return with random crap that had absolutely no relation to her job, or the task we sent her to do. Random license plates, a handful of dead butterflies, and a baby seat were among some of her more interesting "finds."
When we pressed her, she would always say that she was on work grounds the entire time, and that she had just "found" these things. In hindsight it was pretty amusing, aside from the whole not-actually-doing-any-work aspect of it. It took us two years to performance manage her out.
I got hired on at this animation studio as a marketing intern over the Summer during college. For the first two days, my "boss" was a no-call no-show. When I asked my co-workers, apparently this was common. He finally shows up at noon on the third day, proceeds to loudly have sex with his secretary in his office, and then comes over to my cubicle.
"Calteg, I need you to develop a sales tracking software."
"Uhhhh, you hired me on for a marketing position. I'm an intern."
"Blah blah blah, really need you to be a team player blah blah"
"Okay, well which software are you currently using?"
"None. I need you to design it from scratch."
I started laughing, told him he needed to up his budget by a few hundred thousand dollars and quit on the spot.
When I worked in IT at a radio station, I hired a Pilipino assistant. She showed up for work the first day at the same time I did. I got to watch her snatch a bird out of the friggin air with her bare hands in our parking garage. I never would've believed it if I didn't see it with my own eyes. She kept it in her hand the entire day, and then never showed up for another day of work.