The door opens but no one is there

You knock using the rusted out brass knocker, now green and brown in color. The sharp shrill creeks it makes almost as loud as the knock. The door instantly opens slowly, again to a symphony of protesting parts. But no one is there. The door just opened itself, maybe threw a mechanical device. You walk in and the lady follows, but you hear a loud clang!. You spin around to see a metal gate has flung itself down blocking the door, and it caught the American lady on the way down, spearing threw her body and leaving her dead and still standing, supported by the shafts of sharpened metal. You stare in horror and disbelief.