Hilarious challenge from the Top Gear boys as they attempt to cross the Channel to France in their brilliant but useless home-made amphibious cars. Clip taken .\r<br>\r<br>Click here for the HQ version Hilarious challenge from the Top Gear boys as they attempt to cross the Channel .\r<br>\r<br>\r<br>\r<br>In an effort to see which is the quickest way to get across London, Hammond gets on his bike, James takes to the road and Clarkson goes for a ride down the .\r<br>\r<br>Richard is at the Essex Raceway to pit his motorhome against a variety of other RVs, including one driven by James. Who will be victorious, and what will be left .
