Houdini's Great Escape, also known as Boo-dini during Fright Fest and Houdini - The Great Escape at Six Flags New England, is a dark indoor Vekoma Madhouse attraction located at Six Flags Great Adventure and Six Flags New England. This ride is located in Great Adventure's Fantasy Forest section and New England's Crack Axle Canyon area. The attraction opened at both parks in 1999, and was standing but not operating at Great Adventure from 2008 to 2009. but was opened again due to popular demand.

A Madhouse is a flat ride usually manufactured by Vekoma. A similar attraction under the name Mystery Swing is created by Mack Rides. The ride is designed to be an optical and physical illusion, consisting of several rows of seats attached to a swaying gondola within a rotating drum. The ride creates the impression that the rider is turning upside down, whereas it is actually the room that is moving around them.