Image: Philippe Lejeanvre
This performer creates a gorgeous mushroom-shaped fireball.
Of course, there’s no fire without some sort of fuel – and there are a few different types favored by fire breathers. The best are substances with higher flash points (the lowest temperature at which they can vaporize and burn), like highly purified lamp oil, or paraffin. The worst are spirit-based fuels, alcohol, or most petrochemicals. In France, a popular fire-breathing fuel is a de-aromatized oil called kerdane.