First pixel piece submitted to Pixeljoint, possibly a tad bit over-dithered. :P
Nice pose :D
Yeah, I wasn't too sure what to do with the preview so I just did basically what you said. :B
Based on the preview and title, I thought he rammed his head through a wall O_o
Looks good, but the preview needs work, it looks like you just got the paint brush tool and made a few lines. You could make a BG or make the lines a lot neater.