True, a sci-fi horror movie, but it works great for Halloween, and it's outstanding! Your final work looks great. The color, shadows/lighting is excellent. I luv the extra touch of all of the pot smoke billowing on the floor :D ! That Thing is totally stoned!
I really like the blues in the background, they came out really good
My favorite John Carpenter movie. I still am bummed you didn't care for 'In the Mouth of Madness'. That dudes either hot or cold, though...(Also, nice drawing)