Fire symbolises a process, like combustion in an engine or roasting in the preparation of coffee.
We have made flying sparks with a specific direction, rolling flames  over a ceiling or placing them in a specific space. Controlling the amount of oxygen and the kind of fuel we burn affects the forms and colours of the flame.

Flames in a cylinder for Jaguar

The camera enters the tube.

Sparks for Leffe beer

While he was working on the Leffe beer commercial, Raf Wathion needed sparks in a circular environment. Which we provided. It was actually line producer Fred Vrancken who suggested this solution. We combined sparks and a rolling flame in a compact situation