Nightmare Fuel / The Vanishing

  • The ending. When Se7en was first released, one critic said it featured the most frightening ending of any film since this one. They were bang on the money.
  • The core premise, in a very Adult Fear-sort of way. Your girlfriend goes to the shops - and simply never returns.

http://tvtropes.org/pmwiki/pmwiki.php/NightmareFuel/TheVanishing