Crunt

A boost brick, with a small trigger gyroscope which releases LOX and ignites when the brick is travelling 'forwards'. Often used as grenades.

The most commonly used size is the 280g Minicrunt, but versions as small as the 12g micro-crunt exist. The basic size is 2.2kg, and only normally used for demolitions and by mafia bosses. The 112kg Mega Crunt and 1750kg Terror crunt are virtually never seen.