I used to spend ridiculous amounts of money on Halloween displays. The thing that scared people the most was a big red button I encouraged them to press. My plan was to give the first person who pressed it all of our candy and a cash prize. No one ever did.
Not only that I answered all questions, things like "Will it scare me?" No. "Will something jump out if I press it?" No. "What's going to happen?" I can tell you that nothing bad will happen and you'll probably like the result. And so on.