Tim Rowett welcomes an old friend Clive Panto to the Grand Illusions tv studio, and Clive brings with him an amazing contraption. Sometimes called a blow back pipe, this weird device is made largely from brass and was apparently used by miners in Wales to check out how well their lungs were working. <br /> <br />If you blow hard enough into the gadget, which looks a bit like a metal pipe, then this causes the little windmill to spin. Clive manages to get it spinning well enough. But then he passes it across to Tim to have a go, and things do not go entirely according to plan...
