Given a choice, would you opt to receive absolute proof of the existence of the "supernatural"?

Suppose someone offered to show you something which could not be explained in any way except through supernatural means, but would be absolutely terrifying. For example, some sort of ritual which would produce unmistakable proof that malevolent spirits and demons and such surround us.

Would you prefer to know for a certainty that such things exist, or would you rather remain uncertain? Could you ever again endure being alone in the dark if you knew? Or would the knowledge that there is more to reality than just ordinary physical matter be worth the terror?

(Bear in mind this is a hypothetical question. Even if you currently believe there is no such thing as the supernatural, assume for the sake of the question that you may be wrong.)