Snakes on a Plane

Yes. I went.

Imagine every concept of every B movie you've ever seen rolled into one. Marginal plot. Completely flat and undeveloped characters. Every single action and reaction easily predictable from the first scene onwards. An utterly standard ending. Ridiculous dialogue delivered in complete seriousness.

Now, imagine that movie, with the protagonist as Samuel Jackson, and the antagonist being a few hundred enraged snakes going on a killing rampage on a plane.

They don't deliver a single punchline, but you'll come out of there doubled over with laughter.

Best. Movie. Ever. It's so bad it's good.