It finally happened.
The ladies’ room here has two paper towel dispensers which are activated by motion.
One of them is also haunted and activates when the light is turned on.
I entered, the motion-detecting lights turned on.
The light-detecting towel dispenser dispensed a towel.
The motion detecting towel dispenser detected the motion of the light-detecting towel dispenser and dispensed a towel.
The light detecting towel dispenser (which, you will recall, also detects motion) detected its companions motion in dispensing a towel and responded in kind.
I left them still chattering back and forth between themselves.