My Story Drafts/Fails

Knock Knock

Knock.

There is a knocking sound at the window of his bedroom. He puts his hand at his hair, and feels the buzzed hair. While wondering what could that knocking sound be coming from?

With a small push, all of the blankets fell off the teen and onto the bed - or the floor. Freeing him of the blankets and giving him more accessibility. Or the ability to leave his bed.

He walks over to his bedroom's one black curtain panel that doesn't work too well. He slips his hand on the left side of the curtain panel.

.

There is nothing on the other side of the window. Nothing that could have caused the noise. He could go outside and check it out. But that would mean getting out of his room and such, because his window has a screen on it. 

Maybe it was his imagination. Then again why would something that was his imagination cause fear and adrenaline to course through his veins? And why was it harder than the usual to go back to sleep that night?