As is usual, the efficiency question remains unanswered.. This requires energy input to work (to break apart the water), and at the end of burning the resulting gas you have water again.. so, if it produces more energy than it uses, you could run it on it's own output and have a perpetual-motion machine. OTOH, if it produces less energy than it uses (in keeping with the laws of thermodynamics as we know them), then it's just another energy transport mechanism. I wish him luck, and I do hope he finds something interesting and useful here.. but given that he seems to be willing to (at best) not correct omission of or (at worst) actively hide the fact that a lot of energy has to get put into the system to get something out, I'll stay on the skeptical side of the fence for now. ...tom At 06:05 PM 6/11/2006, Shel Horowitz wrote: >Remarkable Fox-Florida segment on water-powered welding and vehicles. I >was skeptical enough to play on Google; it's apparently real: