The desire to be bound, gagged and even suffocated is a thrill craved by a growing number of Americans.

This video takes you through the three most horrifying Halloween experiences in the United States: “The Victim Experience” in Las Vegas, “Blackout” in San Francisco, and, arguably the most terrifying of all, “The McKamey Manor” in San Diego.

If you are a Halloween horror seeker, you aren’t alone. A study from the University of British Columbia’s Sauder School of Business finds that fear offers a hormonal release, a key emotional benefit.