Speed with Guy Martin

For his second adrenaline-fuelled challenge, the racer tries to set the world record for riding a motorcycle on water. With the help of a Cambridge professor and a team of marine engineers, he attempts the feat at Bala Lake in Snowdonia, with extra fittings on his bike that should enable it to skim across the surface. Crashing is inevitable, so Guy endures a rigorous training schedule to prepare himself for the task