he was sent by Slenderman to quote "get rid of you," in the cover of darkness, he went to your house, jumping through your window and saw you sleeping, he pulled out his knife, approaching you slowly, holding the knife above his head

"Go... to... slee-!"

just as he was about to do it, he stopped himself, stopping mid catch-phraise as he took a closer look at you, something about you looked so peacful, so... innocent.. he couldn't do it..

"Ugh.. why do you have to look so innocent?"