When I was IP, a housefly somehow made its way through three locked doors and buzzed us constantly during groups. Drove us nuttier than we already were. One of the patients named it Carl, another drew a picture of it, and I added a poem that could be sung to the theme song from The Beverly Hillbillies TV show. We gave these things to our group leader, who was in on the joke. I know...only in a psych unit could a simple housefly be the source of so much amusement.