A lady came to the hospital to visit a friend. She had not been in a hospital for several years and felt very ignorant about all the new technology she saw.
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."