DO NOT GO SEE THIS MOVIE.
If you value your ability to sleep with the lights off -
If you don't want to jump out of your skin at every little noise -
If you ever want to have a regular heart rate again -
JUST SKIP THIS ONE.
(Ok, obviously if it had this much of an effect on me, it probably did what any good scary movie is supposed to do - but still...)
I think I now fall into the camp of people who will not go see scary movies.