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A fire jet (also called flame spurt) is a mechanical flamethrower found in Super Mario 64 and its remake. Fire jets are indestructible flamethrowers, the appearance of which varies depending on the level. In all of the Bowser levels and Rainbow Ride, fire jets are stone and diamond-shaped. In the main course of Lethal Lava Land, one appears as a near the volcano as a black brick, and inside of the volcano, they appear as holes in the walls.
About every three seconds, a fire jet shoots a stream of fire from its center. If hit by the flames, the character will lose three life points and will start to run around, making it difficult for the player to control them. If the player's character jumps around while they're on fire, their movement will be limited and may only take two points of damage.