Idk where to post this, so i found this section. I'm trying to think of an alien movie I saw once, but I can't think of the name of it.
It had 4 childhood friends, who were friends with a 5th, I guess retarded guy? And this alien thing comes down or appears, and starts killing them off and taking them over. And in the end, it was the 5th guy, who turns out to be an alien that saves them.