LED Wand Clock. On the right you see the LED wand waving back and forth. What you do not see is the current time, which, during normal operation, would seem to float in the air.
It seems innocent enough.
Then why has nobody admitted to leaving it there? One cannot help remembering Stephen Hawking's recent warning about aliens. Wouldn't it be clever of them to plant their super-high-tech spying mid-control devices in our own pitiful gizmos and then to leave them here and there. After all, these aliens don't neend to nuke us; they have sneakier ways of conquering us.