The Short Circuit is a primary Engineer wielded weapon from Team Fortress 2, being a yellow futuristic ray-gun with two prods for a barrel that replaces the Engineer's forearm.
The two prods fire a lightning strike of energy that destroys any and all air-born projectiles. However, the energy strikes are extremely weak and deal barely any damage to actual opponents, making the weapon very defensive rather than offensive. It also doesn't require a reload, instead using metal for ammunition, and gets no random crits.
- The Short Circuit was originally intended to be a forearm replacing mini-gun acting as a Deus Ex: Human Revolution promotional item, resembling Lawrence Barret's firearm. This was changed for unknown reasons.