Spinning tunnel

Spinning tunnels—which are also known as vortex tunnels or rotating tunnels—are devices used at haunted attractions and amusement parks. When people walk through the center of a spinning tunnel they can experience vertigo and a loss of equilibrium as their brains receive conflicting signals from their bodies and senses. A prominent manufacturer of the attraction, GEP Productions, registered the trademark Vortex Tunnel^®, and has subsequently defended the trademark vigorously.

The traditional version of the spinning tunnel consists of a tube made up of a series of rings which is typically up 10 feet high and up 20 feet long. The tunnel liner bears images or designs that create the illusion of movement while the tunnel is in motion.

Another type of vortex tunnel uses a stationary tube with LEDs or rope lighting imbedded in the walls which light up in patterns designed to mimic motion.

Laser vortex tunnels that can be contained in a domed enclosure are favored by the home haunting industry. Made from parts acquired a at local hardware or discount department store, the tunnels are built using LEDs, incandescent or fluorescent lights, blacklights or lasers—or any combination thereof—paired up with a laser vortex. The laser vortex lighting system projects a rotating pattern onto the mist or fog provided by a fog machine, creating the illusion of a moving vortex.

Traversing the tunnel is a beam bridge, usually about 36 inches wide and about 15 inches high, which provides the pathway for visitors to pass through the attraction. Handrails securely fastened along the length of the bridge are necessary for the safety of the participants. Lighting for the tunnel can be mounted under the eaves of the bridge or beneath the handrails, and may consist of rotating colored lights, high-powered LED lights, laser lights or blacklight fixtures. In the case of the laser vortex tunnel, the lighting may be mounted on the floor. The bridges or walkways can be designed to tilt, wobble or vibrate as visitors proceed along the path, providing unstable footing and causing a further loss of balance.

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Wikipedia