"Killing" the killer

In most horror movies, the last survivor barely escapes but not before doing something that appears to KILL the killer. Wouldn't it be great if the survivor had the option to close the hatch themselves, but by doing so, is allowed to set a trap somewhere on the map to presumably kill the killer? A flame trap, a spear trap, an electrocution trap, something that provides a really cool "death" animation that automatically opens up the doors so the final survivor can escape.

Thoughts?

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