On April 7, 1972, McCoy staged the best known of the so-called "copycat" hijackings (see below). He boarded United Airlines' Flight 855 (a Boeing 727 with aft stairs) in Denver, Colorado, and brandishing what later proved to be a paperweight resembling a hand grenade and an unloaded handgun, he demanded four parachutes and $500,000. After delivery of the money and parachutes at San Francisco International Airport, McCoy ordered the aircraft back into the sky and bailed out over Provo, Utah, leaving behind his handwritten hijacking instructions and his fingerprints on a magazine he had been reading.