In his original appearance, Jason was scripted as a mentally disabled young boy. Since "Friday the 13th", Jason Voorhees has been depicted as a non-verbal, indestructible, machete-wielding mass murderer. Jason is primarily portrayed as being completely silent throughout the film series. Exceptions to this include in part 3 when he grunts in pain several times when final girl Chris manages to stab him (once in the hand and once just above his knee), flashbacks of Jason as a child, a brief scene in "Jason Takes Manhattan" where the character cries out "Mommy, please don't let me drown!" in 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, who would kill people left and right, but get "beaten up and knocked down by the heroine at the end". McLoughlin wanted Jason to be more of a "formidable, unstoppable monster". In resurrecting Jason from the dead, McLoughlin also gave him the weakness of being rendered helpless if trapped beneath the waters of Crystal Lake; inspired by vampire lore, McLoughlin decided that Jason had in fact drowned as a child, and that returning him to his original resting place would immobilize him. This weakness would be presented again in "The New Blood," and the idea that Jason had drowned as a child was taken up by director Rob Hedden as a plot element in "Jason Takes Manhattan".