If you nail your Catherine Wheel to your fence, it will scorch your fence.
This is because you set it on fire.
Amazing, really, that this did not occur to me until after I'd done it.
A firework with a circular plastic centre and a taper wound around the outside. When you light it, the end shoots out sparks, and the force of that makes it whirl round and round, so you get the optical illusion of a circle of sparks.