A pressure mine is an explosive device that detonates when a certain amount of pressure is applied, usually by the weight of a vehicle or person. Synonyms for pressure mine include anti-personnel mine, landmine, booby trap, and improvised explosive device (IED). Anti-personnel mines are usually designed to injure or kill individuals, while landmines are designed to obstruct or deny access to particular areas. Booby traps are explosive devices that are hidden and triggered by an unsuspecting victim. IEDs are homemade explosives that are often used by terrorists or insurgent groups. All of these terms describe dangerous and often deadly weapons that are used to inflict harm on others.