WHEW, this was fun! (But also took roughly 7 hours of drawing and researching) The background is simply a screenshot, not something I drew.
Based on a true story. I got to play the real P.T. exactly *once*, at a friend's place. The game was already solved at that point, and I had seen a few videos about the game already. So off I went, down the hallway, dispensing my game knowledge to my friends who were watching me play. As soon as the radio came on, I… well.. the image tells the story of what happened.
One of the friends that witnessed my genuine yelp of utter terror has thanked me multiple times for the privilege of witnessing it.