> That means, if I give you a placebo, and tell you it's a placebo, there's a 1 in 3 chance it will help alleviate symptoms of whatever I say it's for.

I've seen this avert bad trips.

"This is a coin. It's just a regular coin from my pocket, but I want you to carry, and know that as long as you carry this coin - for the rest of the night - you'll be safe."