My daughter wanted a pet mouse so as a present for doing so good during the school year she got to pick one out on the last day of school last June. She chose a brown "fancy" mouse and named him Lil' T (short for Lil' Tiny).
So Lil' T, with his ghettofabulous name, became a new member of the family. It was soon after that we discovered a little quirk of his. (And the first time we saw this, we thought the little critter was dead) :
He actually climbs onto the back of his wheel and sleeps hanging over the ledge. I thought only bats slept hanging.