Interesting movie. Did anyone notice at the end of the movie that the light wasn't flickering and there was no ladder? And where was the screw driver that Sean dropped from the roof top? Sean, himself; was on the ground. And the way Andrea responded to him and as quickly as she did, I'm thinking this all transpired in the 20 mins., he said he was going to be gone. I think he just blacked out, was possibly intoxicated and this was all a bad dream manifested from his fears, etc. Though I have to admit, there were hints of alien abduction throughout, especially the ending when he was "awake"....so IDK.