That’s what one guy was saying, that the carbon fiber would start making a cracking sound. Another said it was possible water started shooting inside but at an extremely high velocity. I would think that or both would have been the absolute worst knowing they chose poorly right before they became liquified but we will never know.
In supercritical coal-fired power plants, a pinhole steam leak from the steam pipes at 3,200 psi will cut off your arm (or worse). Power plant guys tell tales of plant personnel walking around with broom sticks searching for the leak. I never did find out if that is an old wives tale or true.
With a brittle carbon fiber shell, there’s no chance they could detect leak. The whole shell disintegrated in a split second, probably before the nervous system and brain could detect anything was wrong. Think of you standing on a runway and a 747 landing on you. Or you stepping on an ant.