Want to have some fun?
 
Take a can of pressurized air in your car, the kind you use to clean camera lenses or, as I recommended, keyboards, and leave it in your car.

Park the car in sunny location, preferably in the middle of August, somewhere in Arizona. Wait until the inside of the cab to get nice and toasty.

Then watch how the compressed air can flies through the windshield and lands 20 feet away.

The other option is to spray a blast of air onto your auto's dashboard -- then light a cigarette. This PDF shows what happens.

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