Booby trap

In warfare, a booby trap is an antipersonnel device, such as a landmine or grenade, placed in building or in a noncombat area that has a psychological draw for enemy soldiers.

For example, during World War II, scales in warehouses and factories were rigged with explosives. Allied soldiers securing an area would be tempted to step upon the scale to compare their weight with that of their compatriots, and would thus perish.

During the Vietnam War, motorcycles were rigged with explosives and abandoned. Soldiers would be tempted to ride the motorcycle and thus trigger the explosives.