When the Rhedosaurus comes ashore and reaches Coney Island amusement park, military sharpshooter Corporal Stone takes a rifle grenade loaded with a potent radioactive isotope and climbs on board a roller coaster. Riding the coaster to the top of the tracks, so he can get to eye-level with the beast, he fires the isotope into its open neck wound. It thrashes about in reaction, causing the roller coaster to spark when falling to the ground, setting the amusement park ablaze. With the fire spreading rapidly, the park becomes engulfed in flames. The Rhedosaurus collapses and eventually dies from isotope poisoning and heat stroke.