- Everything is not what it seems to be.
- Someone has a secret.
- She wasn’t really dead.
- He was dead the whole time.
- Neither of them actually existed.
- The secret was concealed within the painting/sculpture/pet collar all along.
- The whole film takes place in one person’s mind.
- Or in a dream.
- Or a snowglobe.
- Bulletproof vest.
- Good guy actually a cloned Nazi.
- Smokey is the Bandit.
- It’s a sled, but actually his wife’s vagina.
- The dongs are coming from inside the house. (That is actually a specific spoiler, from a pornographic horror film called When A Stranger Cums Calling.)
- The characters are in Hell.
- The characters are in an experiment.
- The characters are playing characters with roles in Pirandello’s Six Characters in Search of an Author and the whole thing disappears up its own ass halfway through the second act.
- The guy in the mask turns out to be someone the hero knows.
- Or is related to.
- Someone else is pulling the strings.
- Kevin Spacey did it.
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