i used to work at a place where they had timers on the lights in the bathroom
it would come on when you walk in and go off after a few minutes of no movement
wouldnt you know it, there were a few stalls you could dance in and it wouldnt detect movement?
you ever have to wipe in the dark, and try to figure out if you had a 2 or 3 wiper?
One way to get a racing stripe !