This week on Car Talk, where else but on Planet Magliozzi would two dreadful diagnoses be considered good news? Find out what Tom and Ray think is causing Temeka in Minnesota's Caravan crisis, and whether she's buying their "blessed event" logic. Meanwhile, in Johnstown, PA, Don is wondering whether there's a "Hey guys, watch this!" gene, and if he's handed it down to his two-year old son. Also, Suzanne in Chicago's Saab has become a sullen teenager, Tim in Cincinnati is getting smooched by his air conditioner, and William in North Carolina is hoping glue or rope might keep the engine from jumping out of his Blazer. All this, plus some advice your mother never gave you, and lots more, this week on Car Talk.