Firecmb Crasher attacked the Fireworm Queen's nest on Fireworm Island. There, he was able to drive the Fireworms away from their nest and was able to force the queen to leave. There, he planned eat the Firecombs and the Fireworm eggs. However, the combined efforts of the Queen and the Riders' dragons burned off his flammable slime and left him vulnerable. Outnumbered and defenseless, he quickly retreated from the nest.
This Fireworm Queen had been the main target of this dragon, chasing her out of her home and trying to eat her babies, but then she got her revenge with Hookfang's and Snotlout's help, chasing him from the nest.