(Submitted by Justin)
I'll keep this simple. It makes it that much more "horror"ifying:
Romeo and Juliet. Last scene. NO knife for Juliet to kill herself. NONE. She screams at a fellow actor who comes back onstage with a gun and says, "This gun won't make any noise..." The worst thing I've ever experienced in my life. I had four
heart attacks simultaneously. She tried to cover, put it to her chin and wilted on top of Romeo. After it was over, the audience left saying - "Did she actually kill herself? Was that supposed to happen? Interesting directing choice..."