A stunt double is a type of body double, specifically a skilled replacement used for dangerous film or video sequences, in movies and television (such as jumping out of a building, jumping from vehicle to vehicle, or other similar actions), and for other sophisticated stunts (especially fight scenes). Stunt doubles may be used in cases where an actor's physical condition precludes a great amount of physical activity (such as when the actor is too old to perform extended dubs choreography), or when an actor is contractually prohibited from performing stunts. Stunt doubles are sometimes referred to as "stunties".