It was a mower that floated on air. If I remember right it had weedwhacker string underneath,. Never did go over too well. I think it only lasted about a year. The thing is it would probably go over now. I was watching a guy fly a radio controlled plane the other day. Pretty darn big plane. Got me to thinking...why couldn't servos be attached to a regular garden tractor so you could just sit back, suck down some brewskies (or as Larry says..."a twack") and mow the lawn. If a person could adapt the GPS system off of the huge John Deere farm tractors, they are programmed after the first time running through the course and remember after that. Man I'm onto somethin' and have no money to back myself!!!! SOL again!!