"Shatner save me." John said.

Bill stepped forward, relishing being put back in the spotlight where he belonged. "A camera..my boy is a device used for recording images. Once upon a time they could only record still images. Like a painting only it happened almost instantaneously and didn't use paint."

He began to get into the tale. "But then....men, great men...men of vision figure out a way...to record moving images by taking hundreds of still images and then showing them to people at such speed that the pictures seemed to be moving."

With him so far?