This week's Car Talk features journeys both high and low. First, Tom and Ray salute aviation legend Larry Walters, who took flight in a lawn chair with balloons attached. Back on terra firma, Michaela and her siblings plan to take the family's 20-year-old car on a road trip from Oregon to, well, wherever the car finally dies. She's hoping to make it to Mexico. Tom and Ray think Salt Lake City might be a more reasonable target. Also, Mary Ann's mechanic's solution to her fuel problem could land him in jail; Heather's violating every scientific principle in getting her Subaru to start; and, on Stump the Chumps, we find out if Dale had loose spark plugs, or if Tom and Ray had loose screws when they made the diagnosis. All this, and lots more, this week on Car Talk.