Explaining one of the mindbending tricks. Buster Keaton’s groundbreaking visual gag in The Playhouse (1921) demonstrates his genius in blending physical comedy with innovative filmmaking techniques. In this short film, Keaton performs an illusion where he appears to walk through another person’s body—a stunt achieved through meticulous split-screen double exposure. By carefully masking parts of the frame and re-exposing the film with himself in a new position, Keaton created a seamless trick tha