Matthew Modine and Liam Neeson are promoting a new charity to urge New Yorkers to ditch cars, get on their bikes and tone up their buttocks at the same time. Modine lead the Bike for a Day campaign on Tuesday (18Dec07), and convinced New York neighbour Neeson to join him, by peddling to a specially arranged Manhattan bash - in return for dinner. The Full Metal Jacket star says of the campaign, "With environmental problems you can point your finger and blame or you can point your finger towards a new direction, toward solutions. "Honestly, bicycling isn't just fun and healthy and non-polluting. It's sexy. It gives you a nice rear end."