Feeling a slight bump up in the cockpit, the pilots of Northwest Orient Airlines Flight 305 looked at each other nervously as rain pelted against their windshield at around 200 miles per hour…a relatively slow speed for a Boeing 727. They didn't yet know that that bump meant their ordeal of the past several hours was just about over; that they, along with their flight engineer and flight attendant, would live to see another day—because the man known only as Dan Cooper had just exited the plane by leaping from the rear staircase in mid-flight, with a parachute and 200-thousand dollars strapped to his body, never to be seen again.