Bullet hit squib (used in filmmaking)

> A bullet hit squib is a pyrotechnic, practical special effect device used in filmmaking, television and theatre to simulate the appearance of a person or an object being shot. When used on an actor as a blood squib, an explosive charge bursts open a hole on the costume and a packet of fake blood, expelling its contents. Devices used similarly in props, such as walls and cars, blow out predrilled and filled holes.