This week on Car Talk, did Tom and Ray's advice help free a Mini from a frozen puddle? Find out as Katie from Boulder returns for a round of Stump the Chumps, with a tale of even more woe and intrigue. Meanwhile, from the mysterious noises department, Karen's Jeep sounds like it's been eating too many beans, Nate's Subaru is channeling a Singer sewing machine, and did somebody drop a soda straw behind the dashboard of Kevin's Camry? Or is the car just happy to see him? Plus a heated debate over warming up a car in the morning, a new Puzzler from the Revolt of the Lab Rats series, and lots more, this week on Car Talk.