Slenderman

Here's my attempt at a Slenderman story.
Here's the Slenderman legend: http://www.mythicalcreaturesguide.com/page/Slender+Man

And here's my story.

It'll start as flashes of movement in your peripheral vison. Easily explained. An animal, car, someone walking by, anything. But then, it'll start to happen when you're alone, and this is harder to explain. But there's still plenty of viable explanations. Slowly, these falshes of movement will last longer, as if whatever it is cares lees about you noticing it. But, of course, it's nothing. Just a shadow, is all.
But soon, these visions will not only be visible in the peripherals. You will catch glimpses of movement right in front of you, on a wall, the floor, or even as something solid. Slightly creeped out, you try to find out what might be causing this. Perhaps ther's a scientific explanation for all this. Maybe it's a shadow person. But, during your various google searches, you find an urban legend about a being called Slenderman. You dismiss it as something fictional, created on some forum. But there have been reported sightings. Nah, it's fictional. It doesn't exist. Nothing to be afraid of. Bad idea.
After this, it just gets worse. You start to see him everywhere. Hiding amongst trees and buildings, following you, stalking you.
Until, one night, you are closing your window before going to bed. He is there. You see him. He is no longer hiding. There he is, standing outside your bedroom window, peering in. All thoughts of a prank go out of your head as you realise that this window is on the second floor. You freeze, staring into his dark, dark eyes. His arms extend to an unatural length, sliding towards you, into your room. Suddenly, you snap. You have to get out. You spin around, and rush out of your room. You go into the lounge and turn all the lights on, but to no avail. The tendrils are slithering towars you. There's no escape. You're cornered. You curl up, shivering. Then you feel a cool tendril curling around your neck.
Goodbye.