So what really happened in the basement?
Spoilers!
Okay, so Laura - not knowing Simon is in the basement - blocks the hidden door with the pipes. He then dies after allegedly breaking his neck after falling from the stairs (which is obvious by the ruined staircase)
What made him fall?!
Was he just exhausted and slipped? The door couldn't be opened so it couldn't have pushed him backwards or anything like that. It just kind of annoys me, but otherwise I loved this film.