What's the most hilarious thing you've ever seen in a horror movie?

There are no limitations, from bad acting to crap special effects, funny looking monsters to ridiculous stories and plots.
It could have been intentionally funny, or not.

I choose this scene from The Devil’s Rejects. While no being related to horror other than it being in a horror movie, this cracks me up every single time, I mean it just never fails.

What’s your favourite funny horror moment?