Will This Sort Of Car Jack Ever Be Used?

Question

When I was younger I seen on the TV a new way of jacking up your car when getting a puncture.

It was not mechanical.

What it was was a pipe somehow is connected to the exhaust pipe and this leads to a thick heavy duty bag/balloon which you put under the dooe sill of the car.

You rev the engine and this forces air/fumes into this bag and lifts the car in the same way as a car jack does this.

Then you change the wheel!

Are these methods used at all in the motoring world.

Or was it just pie in the sky?

Answers appreciated.

Thank you

Answer 1

Sounds like one of those one off deals that probably got dropped as soon as some one got hurt and sued

Answer 2

I really don't think I'd want to create that kind of back pressure in my exhaust. And, you'd never be sure exactly what part of the underside of the car was supporting the weight. You'd be risking doing some major damage.