... but me! They [the other four POWs] were all in the room but Hefner, and he was standing in the door. They put Hefner in solitary in the next room over, and then he had an appendicitis attack that night, and they had to operate on him. So, they put him in the room next to were we was at and had to leave the door open. Everybody was going back and forth the the latrine, and they seen him a laying in there in a hospital bed and figured they [the NVA] had beat the hell outta Danny. But, hell, they didn't see me for a week! They didn’t know what had happened to me.”
But, hell, they didn't see me for a week!
I would imagine it's something to boost your self-confidence up and make you care less about the situation. Is that close? Does it have any other meaning in any other context?