Has anyone tried one of these car lifts

Something tells me that a fulcrum based lift was used when the Egyptians built the pyramids. Very smart back then. Then they lost some slaves due to accidents. As man got smarter, and Darwin explained man's idiocy, man made proper lifts, stands and chocks.
Give it a shake before you get under it. Oh, and make sure your wife hasn't left her purse in the car to retrieve while you're under there.