Coca-Cola + Propane = rocket

Two young Russians of the youtube Kreosan channel show us a very simple technique to make a rocket with a bottle of 50cl Coca-Cola and propane gas cartridge. Just inject propane inside the bottle of Coca-Cola by pressing the tip of the spray against the neck, then it remains more to return the bottle. It takes off then instantly like a rocket. Given the violence of liftoff, this experience is to make very carefully.