This week on The Best of Car Talk, Dr. Anastas is having a slow day at NASA. How do we know? He’s wondering how his car would fare in zero gravity, if he brought it along for a ride on NASA's “Vomit Comet” airplane. There might be some traction problems, but would the car even start? Elsewhere, Ann's snowboarding trip got more exciting when her tire caught fire heading down the mountain; Dana fears she’s heading for an explosion after her husband epoxied her Civic’s leaking radiator with J-B Weld; and, every time Dennis washes his wife’s car, it won’t start the next day. Also, the Great Winter Debate: if you shovel out a parking space, is it yours for keeps? All this and more, this week on The Best of Car Talk.