Inside Dark Origins of 'Slender Man' Who Inspired Girl's Stabbing Internet meme began on 2009 forum By Matt Cantor, Newser User Posted Jun 4, 2014 6:54 AM CDT Updated Jun 4, 2014 7:23 AM CDT 28 comments Comments A Flickr image of "Slender Man." (?) (Newser) – Two 12-year-old girls who allegedly stabbed their friend in the woods of Waukesha, Wis., offered a chilling explanation for their actions: They'd been driven by "Slender Man," a mythical figure who's made the rounds on the Internet since 2009. But there are no deep, mysterious roots to this legend: The Washington Post delves into "the complete, terrifying history ... of the Internet meme," finding that a little digging reveals exactly who made it up and when. It all started with a forum on humor site Something Awful asking users to "create paranormal images through Photoshop." That resulted in Slender Man, the creation of one Victor Surge, aka Eric Knudsen, who offered disturbing stories of a guy with tentacles. Knudsen is now seeking a copyright on the story, CNN reports. As Vox describes Slender Man, he's got "no face, no hair, is very, very thin and wears a dark suit." Other users began making up stories of their own as the legend migrated to other websites, including YouTube, Wikipedia, and "creepypasta" sites for scary online fiction, where the girls apparently read about it. Creepypasta Wiki has distanced itself from the attack, whose victim is reportedly in stable condition: "This wiki does not endorse or advocate for the killing, worship, and otherwise replication of rituals of fictional works. There is a line ... between fiction and reality, and it is up to you to realize where the line is. We are a literature site, not a crazy satanic cult."