I live in my head too much, and I have experience in the past with family members who were trapped in theirs. So watching the terrified and confused protagonist's mind slowly unravel hit me harder than it may have hit most. That's probably why I find it so scary - the implications that come not with dying, but with slowly coming apart.I feel like Jacob's Ladder is more eerie than scary. Still a great and very disturbing film!
But woot, someone else has watched it! ^^