The entire top half of my head from the eyebrows up was missing.

That’s kind of scary and even scarier knowing. That’s why he let go and cried. That’s why he tried to cover it up eventually. The way he killed one of the researchers was crazy and even crazier the way he spoke about it and then another, it was like a killing spree. They made a perfect killer out of him. At the end he unsuccessfully tries to kill him self.