Squib (explosive)

A squib is a miniature explosive device used in a wide range of industries, from special effects to military applications.

[2] A squib generally consists of a small tube filled with an explosive substance, with a detonator running through the length of its core, similar to a stick of dynamite.

Also similar to dynamite, the detonator can be a slow-burning fuse, or as is more common today, a wire connected to a remote electronic trigger.

[2] In the film industry, the term squib often refers to electric matches and detonators used to trigger larger pyrotechnics.

[4] Fake blood packets are typically coupled with squibs and attached to the stage clothes worn by actors, referred to as dead-character costumes, that burst through pre-made "bullet" holes to simulate the appearance of a person being shot and wounded.

The pyro fuse is installed on the positive terminal of the battery and receives a signal from the vehicle's control unit in the event of an accident.

During an accident, the pyrotechnic charge in the pyrofuse is triggered, which uses a piston to break the power circuit and de-energize the vehicle's battery.

Squibs were originally made from parchment tubes, or the shaft of a feather, and filled with fine black powder.

0.5 and 1 grain bullet hit squibs and solid polycarbonate backing shields to simulate a gunshot wound on an actor. A blood pack is to be built atop the squib.
A bullet hit squib assembly example to be attached to an actor's wardrobe.
An actor behind-the-scenes with pre-scored "bullet holes" on his costume and squibs blowing open fake blood packets for a gunshot wound stunt.
Pyrotechnic charges from ejector seat of MiG-21F-13 fighter in the Aviation Museum of Central Finland