When my Dad was in the United States Air Force he had to go to a training camp that was a pretend POW camp. They put him in a box where he couldn’t stand and couldn’t sit. He was claustrophobic and wouldn’t go in even though 4 men (according to him) tried to make him. The authorities told him that he’d have to stop flying if he didn’t go in the box. He loved flying more than anything in the world. He wouldn’t go in and he had to stop flying. He left the Air Force soon after that.
Can you imagine how people with claustrophobia would feel, not only seeing but then told of such suffering in the past. It may have a detrimental effect on them if depression is also the case.