Radioactive
Warning: highly active material inside! Radioactive hits a lot harder than the label lets on, 127 fanned shots on nearly 1.8 kilos of powder.
The fan spreads the whole reaction wide across the sky, one fuse carrying it from first break to meltdown. Rated F3, a display firework: keep spectators at least 25 metres back for safety.
Nearly two minutes on a single fuse and it never drops below a boil. It's one of ours, and we're properly chuffed with how it turned out.

