This short video clip is extracted from a more detailed 2 minute clip, which I filmed earlier. It can be found at www.youtube.com . These are not normal soap bubbles. They are filled with HYDROGEN gas! Hydrogen is a colorless, odorless, and highly flammable gas. A spark gun (gas appliance igniter) was used to ignite the hydrogen bubbles. The hydrogen combines with oxygen from the air, forming water vapor, and releasing energy.