When Cameron is stuck in the vault with the air being sucked out, he sets some combination knobs on the inside, and then turns the handle that would unlock the door to the vault.
They never show the air returning to the vault. Aside from how Cameron could breath, the pressure differential would not allow the others to open the door outwards into the room.
Assuming the door is about 5 ft wide and about 7 ft tall, there would be about 37 tons of pressure on the door if there were vacuum inside the vault.
The math - the door is about 60" wide, and about 84" tall. If the air pressure in the outer room is normal sea-level of 14.7 PSI ( pounds per square inch), then 60x84x14.7=74088 pounds, or about 37 tons if there is vacuum on the other side..
They never show the air returning to the vault. Aside from how Cameron could breath, the pressure differential would not allow the others to open the door outwards into the room.
Assuming the door is about 5 ft wide and about 7 ft tall, there would be about 37 tons of pressure on the door if there were vacuum inside the vault.
The math - the door is about 60" wide, and about 84" tall. If the air pressure in the outer room is normal sea-level of 14.7 PSI ( pounds per square inch), then 60x84x14.7=74088 pounds, or about 37 tons if there is vacuum on the other side..
When Jonathan pounds on the vault window the sound and his voice are heard, muffled. Since the air has been evacuated the sound could not travel inside it. Further, when the door opens the loose paper on the floor is undisturbed by what should be air rushing in to fill the vacuum.