Our work with the smoke ring machine led us to the "Airzooka" - a very silly toy that lets you shoot people with vortex rings from a distance.

We thought it would be interest to fill the airzooka cavity with propane, then launch a vortex ring of propane at a pilot light, causing an aimed ring of fire.

Potential uses:

• Creating remote flame rings in bonfires
• Stop-smoking campaign

It was rather difficult (like most fast-moving fire effects) to catch on film, but here is a small taste of what we created.