'' Beware the Slenderman '' ( stylized as '' _ beware the slenderman '' ) is a 2016 American documentary film directed by Irene Taylor Brodsky about the Slender Man stabbing . It premiered at South by Southwest in March 2016 and was broadcast on HBO on January 23 , 2017
Slender Man stabbing
Slender Man stabbing
Beware the Slenderman