They were dead. Onset of rigormortis.
At 35,000 feet, the outside temp is -80 degrees. If the cabin loses pressure, not only is there no oxygen, it's friggin cold. When a cabin loses pressure, the pilots are supposed to do a nose dive to 12,000 feet immediately where there is more atmospheric oxygen and warmer temps. Once a cabin loses pressure, however, it only takes 15-30 seconds before you can become unconscious....