The Reluctant Camry
Amanda's Camry has a manual shift, and, like many stick shift cars, it has a switch that disables the starter motor. The starter defeat switch, called a clutch interlock, requires that you step on the clutch pedal to start the car. Manufacturers put these in because they think we're stupid. They're afraid some oaf will start the car in gear and crash into somebody, and they'll get sued for millions of dollars.
So, as Amanda's new, thick floor mats slid around, they sometimes prevented the clutch from going all the way to the floor, which interfered with the switch. The dealer generously fixed the problem by flinging the mats into the back seat.
[ Car Talk Puzzler ]