Jason Voorhees a child's voice before being submerged in toxic waste, and in "Jason Goes To Hell" where his spirit possesses other individuals. Online magazine Salon's Andrew O'Hehir describes Jason as a "silent, expressionless...blank slate." When discussing Jason psychologically, Sean S. Cunningham said, "...he doesn't have any personality. He's like a great white shark. You can't really defeat him. All you can hope for is to survive." Since "Friday the 13th Part VI: Jason Lives", Jason has been a "virtually indestructible" being. Tom McLoughlin, the film's director, felt it was silly that Jason had previously been just another guy in a mask,
Jason Voorhees copy of the Necronomicon Ex-Mortis, from the "Evil Dead" franchise, in the Voorhees home as a way to insinuate that Jason was actually a "Deadite", a type of demonic being from that series. Marcus stated the book's placement was intended to imply that Pamela Voorhees had used it to resurrect Jason after his childhood drowning, resulting in his supernatural abilities: "This is why Jason isn't Jason. He's Jason plus "The Evil Dead"... That, to me, is way more interesting as a mashup, and [Sam] Raimi loved it! It's not like I could tell New Line my plan to include "The