As a child I loved replacing burnt out incandescent light bulbs with new vibrant ones. I was fascinated by the fact that you could shake the dead bulb and hear the filament rattling — a musical confirmation that the bulb was indeed broken and no more light could be extracted from it. Most of all, I loved to see light shining again in a space where once there had been darkness.

It happened from time to time.

Someone in the audience would ask what he thought was a trick question.

This was supposed to be some kind of test.

The trap nearly always caught the trapper.