I don’t understand how the air could heat to the surface of the sun before it imploded. I would think that alone would vaporize anybody in it before it did. I would think the worst nightmare would be in a sub with no way to get out as it fills with water like that movie “The Abyss” where they can’t get the door open and the Captain has to watch them drown.
I don’t know about that-I understand how compressing a gas increases the pressure and vice-versa, but it was certainly the overpressure that killed them, not the increase in temperature, I would think. (PV=nRT)