The set of "Mission: Impossible 3" has been filled with taut nerves as its leading star, Tom Cruise, insisted to carry out his own stunts which unquestionably terrified the all the people on the spot. Refusing to use a stunt double for the dangerous high falls scene in the film, Cruise's determination surely has scared the legendary stunt coordinator Vic Armstrong, who is working on the film with him. "He did a 70-foot fall for us last week," so said Armstrong to Total Film magazine. "He's amazing. He did about seven takes. Absolutely terrifies me-I can see the headlines! What a way to finish a career."