These dynamic and personable businessmen from Dublin insist that they have found a way of producing free, clean and limitless energy out of thin air. So, as they prepare to demonstrate this wonder of science to me...I feel all the excitement of Christmas Day. There is a test rig with wheels and cogs and four magnets meticulously aligned so as to create the maximum tension between their fields and one other magnet fixed to a point opposite. A motor rotates the wheel bearing the magnets and a computer takes 28,000 measurements a second. And when it is all over, the computer tells us that almost three times the amount of energy has come out of the system as went in. In fact, this piece of equipment is 285% efficient. We couldn't believe it at first, either," says McCarthy, chief executive of the company. "We wanted to improve the performance of the wind generators...so we experimented with certain generator configurations and then one day one of our guys...came in and said: 'We have a problem. We appear to be getting out more than we're putting in.'" That was three years ago. Since then, McCarthy says, the company has spent 2.7m developing the technology. Until their claims have been assessed by the jury, McCarthy says they won't be accepting any investor offers. So if this is a hoax, it would appear not to be a money-making scheme. The Economist ad alone cost 75,000. "We expected stick, and we're getting it already. We've had a lot of abusive emails and telephone calls -people telling us to watch our backs"