Everything onscreen in the original release of ‘The Exorcist’ happened on set, captured in the camera. There were no composite or matte shots, no processing and obviously no CGI in 1973. If they couldn’t do it and film it they weren’t going to use it. This spider-walk sequence, one of the most jarring and surreal moments in William Peter Blatty’s novel, was something they were able to accomplish, but they didn’t have the ability then to digitally remove the wires attached to the gymnast stunt pe