The Giant Worm is a slithering creature encountered in Capek's caves, and is possibly a result of his experiments. The worm is known for its sheer size and effectiveness, but not for its greatest weakness: fire.
When encountering them, the player must shoot the inside of their mouths. Shooting the outside is less effective. Keep moving and shooting, and stay clear when it is jumping, otherwise you will die instantly. If you have the Flamethrower, half a Second is enough to instantly kill it, making it a very easy Enemy to defeat