The Thing
Easily the best horror movie I have ever seen. The attention to detail from John Carpenter is next level not just for a horror movie, but for any genre. Through every twist and turn it leaves you guessing on whats going on and whose who. Not to mention the ending, which after a quick search I find out no one has been able to figure it out in the last 40 some years. I will say it did throw me off seeing such a young Kurt Russel.