Linda Blair's animatronic double in The Exorcist (1973) was a life-size robot built by special effects artist Marcel Vercoutere. Vercoutere used wires, pulleys, and offstage supports to create the bed's shaking and Blair's levitation. https://t.co/J9H8bIIIRh https://video.twimg.com/ext_tw_video/1848069773533298689/pu/vid/avc1/652x424/_8rlSDsRS19_79qn.mp4?tag=12