[IYAS9YAS]

It was not known why they lost pressure, but it was surmised it was so fast they did not have time to put on 02 masks.

The time of useful consciousness at 35,000 feet has been found to be 30 to 60 seconds. Rapid decompression at 35,000 feet MSL could cut that time in half, due to forced exhalation of air from the lungs, but 15 to 30 seconds is still reasonable time to don masks.

Source: http://en.wikipedia.org/wiki/Time_of_useful_consciousness

[Rennes Templar]

Didn’t work for Payne Stewart.