A few years ago, I parked my Mazda 626 at the DFW airport for a few days. When I came back, I noticed that the heater blower fan was making a strange noise, like the fan was out of balance. A day or so later, I noticed a dead rat smell in the car. A mouse had apparently climbed in the car at the airport, and had been inside the squirrel cage fan when I turned on the heater. The centrifugal force flattened him like a pancake.
