The overhead lights cast no shadow, even of your hand if you held it out like you were reaching for a tray.

NEWYORKER: Wiggle Room

And when should you walk away from the telephone and shop, golf, or do whatever it is you need to do to get the issue at hand out of your mind, even if just temporarily?

FORBES: When To Call A Lawyer And When To Walk Away From The Phone

Even if it's a tiny, scrappy circuit that flashes a set of lights on and off when you wave your hand over it, it's your circuit.

BBC: Viewpoint: The confessions of a late adopter