"The (surviving pilot's) last memory before passing out was the realization that the water on his tongue was boiling, according to NASA. Water boils at lower temperatures as pressure decreases."
I believe you misread the Bloomberg article. The water boiling on the tongue was from the 1965 NASA vacuum chamber incident:
At NASA's Manned Spacecraft Center (now renamed Johnson Space Center) we had a test subject accidentally exposed to a near vacuum (less than 1 psi) in an incident involving a leaking space suit in a vacuum chamber back in '65. He remained conscious for about 14 seconds, which is about the time it takes for O2 deprived blood to go from the lungs to the brain. The suit probably did not reach a hard vacuum, and we began repressurizing the chamber within 15 seconds. The subject regained consciousness at around 15,000 feet equivalent altitude. The subject later reported that he could feel and hear the air leaking out, and his last conscious memory was of the water on his tongue beginning to boil.
Human Body in a Vacuum