A lady came to the hospital to visit a friend. She had not been in a hospital for several years and felt uneasy, not knowing about all the new technology.

A technician followed her onto the elevator, wheeling a large, intimidating looking machine with tubes and wires and dials.

"Boy, would I hate to be hooked up to that thing," she said.

"So would I," replied the technician. "It's a floor-cleaning machine."