Slenderman really started getting annoying recently. Last year it was like, "Have you heard of Slenderman?" and someone would reply, "Oh, I think I read a creepypasta about that." Nowadays it's, "Have you heard of Slen-" "SLENDERMAN?! YES YES YES".
I would assume it was fictional
Well, i'm not stupid, I would assume it was fictional...but...the coincidnce...
lol, slenderman isn't real
Oh yeah? Then how come I just saw something move outside?
Because, you're paranoid, or maybe it was a cat, or an old man
Animal or a person moving around.