why not? he's bat shit crazy, he's having a paranoid delusion lol.
So you're saying that what the workers were telling him about the story was all made up? Or they told him that to play along with his game, yet it backfired when he disappeared and went to the cave? Or did he even go to the cave at all? AHHHHHHH!
If you were a beautiful sound in the echos all around, I'd be your harmony.