 One would use an empty moon cake tin as the container to bring candle wax to the boil, possibly adding newspaper scraps or other flammable fuel.Once wax fire reaches its peak, one would pour water onto the flames thus creating spectacular sizzling and steam.This practice is dangerous due to the flames' kickback and volatile amount of flowing hot wax, possibly causing third degree burns; several children have been taken to the hospital each year due to "wax burning" related injuries.