At the National Museum of Emerging Science and Innovation in Tokyo, Japan they have a show called Fear Experiment: Science of a Haunted House. This has to be the best haunted house experience I've ever been to. The scares were good, very Japanese ghost story style, Ringu, Ju-on and such. However the absolute best part of the whole thing had to be at the end, when you find out that the people that had gone before you were the ones controlling the scares. Timing the scares had to be the funnest part of the experience. I have to say, scaring a group of Japanese school girls is a highlight to be sure.

http://www.youtube.com/watch?v=YSyMQxsUfGo