A German man water-skied behind a cruise liner to win a bet. The stunt was recorded by a German TV show after a viewer wrote in disputing an earlier claim on the show that it would be theoretically possible to water-ski behind an ocean going cruise ship. Reporter Dirk Gion, 40, took up the challenge "to prove it could be done". He was brought up to the correct velocity by a speedboat and then switched over to a line pulled by the 575 foot cruiser MS Deutschland. Mr. Gion managed to stay afloat behind the vessel as it traveled at 17 knots for over five minutes.