Watching: Harry Potter star Rupert Grint talks to Jeremy Clarkson on the Top Gear sofa. Rupert reveals his personal collection of cars, which include an ice-cream van and a hovercraft, and is shocked to learn that his car may have had a problem with the breaks! Can he beat the Dragon's Den star Peter Jones, currently top of the leaderboard? Great clip from series 15 of BBC car show Top Gear. Subscribe to see all the reviews, races and challenges: bit.ly Top Gear YouTube channel: www.youtube.com TopGear.com website: www.topgear.com Top Gear Facebook Top Gear Twitter: twitter.com Latest Top Gear videos: bit.ly Check out extra behind the scenes footage: bit.ly