Approximately an hour later the men regained consciousness. When the forward window began to crack under a thousand meters of pressure, Griffin and McKay moved to the rear of the ship. Unfortunately the release to close the middle hatch was non-functional.
Griffin gave his life for McKay, returning to the cockpit and pulling the manual release. The forward compartment flooded moments later.
Grace Under Pressure - Dr. Griffin annoys McKay with arguments regarding scientific deficiency before crashing their Puddle Jumper into the ocean, an accident eventually leading to his death.