Tripwire hooks are a type of switch that can be placed at opposite ends of each other, connected by tripwire, for entities to activate. They are activated by most entities colliding with the tripwire that connects two tripwire hooks together (e.g. players, dropped items, some fired arrows and most mobs). However, thrown potions, some arrows, thrown Ender pearls, and thrown eyes of Ender do not activate tripwire hooks. Destroying the tripwire while not holding shears triggers a small electrical pulse. Tripwires are one of the five types of switches introduced into the game.