Originally Posted by FLIPADELPHIIA
One also happens when you have to save your partner at the beginning of 13. I you die before you make it to him, a different loading screen will appear
Exactly! Happened to me just about now and I noticed that the creepy voice said something like "Out! Get The Fuck Out", if I remember correctly, it is from that guy at chapter 12 that aparently knew you. After you land on him, if you didn't kill him, he will pull his pistol and before shooting you, he says exactly that from the loading screen.
BTW, the creepy loading screen appear only once, if you die again, the loading will be back to normal. That's a pretty interesting thing, looks like some subliminar message!