I asked this recently on the 'Mandela Effect' thread, but I'll ask on here as it's been driving me mad;
I read a short story many years ago that involves an American guy selling his house to a man who he recognises to be a Viet Cong officer who tortured him when he was a prisoner of war. When the officer leaves the house after viewing it, the owner then sees a small door that he hasn't noticed before. It turns out that it leads down to a cellar that is hell and he sends the officer down there on his next visit to view the property.
I'd have sworn it was in King's short story collection 'Night Shift' but apparently not.
Any ideas?