Check out this video of the scariest haunted house in the USA. It can last up to 8 hours!
Warning: this video contains graphic scenes. McKamey Manor is one of the most extreme haunted house experiences in the US. Subscribe to The Guardian ► http://is.gd/subscribeguardian Located in Russ McKamey's San Diego backyard, the full 'haunt' lasts eight hours, yet no one has managed to complete it.