I've got a "motion detector" floodlight over my porch door in Pennsylvania. What it actually does these days is either refuse to come on at all, or shine for a week straight, day or night.
I've decided it's Wabulon's fault. What I believed happened is this: Wabulon was sitting out on the porch reading Atomism and Its Critics, somewhere in the section on Zeno, Epicurus, Lucretius and so on debating motion. The light started reading along, and what it's doing lately is mulling over these positions. One week, it decides, "Parmenides is right! Motion is just an illusion. I refuse to turn on at all." The next week, he buys into Epicureanism and decides that everything is always in motion, and stays on all week.