Human: What is a'stunt double' and how is one chosen? Assistant: 
A stunt double is an actor who performs the same or similar action as another actor in order to create the illusion of multiple actors performing the same scene. The process of choosing a double typically involves finding someone with similar physical attributes, such as height, weight, body type, hair color, eye color, etc., so that the camera can be positioned correctly for each take. Additionally, it may involve finding someone who has experience in the particular role they are doubling for, so that they can provide helpful advice during filming.