The Riddler Mindbender

Designed by Werner Stengel and built by Anton Schwarzkopf, Mindbender would be the last original roller coaster the park would construct until the arrival of Georgia Scorcher in 1999. Since its debut, Mindbender has had three different color schemes and been counted within three different sections of the park. In its inaugural season, the attraction was part of the USA section and was silver in color. In 1979, Mindbender became part of the new Jolly Roger's Island, itself an offshoot of the USA section. The structure was painted brown during the 1980s. Throughout its first two decades, the trains were silver in color, with a rainbow-colored stripe along both sides.

In 1997, when Jolly Roger's Island was converted into Gotham City, Mindbender was painted green to suggest that it was the creation of Batman's arch-enemy, The Riddler. A waterfall under the coaster was dyed green, and occasionally still is (although at times it retains a more natural color). The trains were painted black, and covered with green question marks, another hallmark of the Riddler. During the 2009 Southeastern United States floods, sections of the Mindbender were temporarily submerged under muddy water. The park was able to clean up and reopen the weekend following the floods.

Like many modern roller coasters, Mindbender operates on the block system featuring 5 blocks: station, transfer table, lift hill, reduction brake, and ready brake. These blocks are controlled by a program running on a programmable logic controller to ensure trains do not collide with one another. To assist in the movement of trains through the brakes, station, and transfer table, a series of feed motors can move a train at slow speeds from a full stop.

Three trains were manufactured for the ride, although the ride control system is not equipped to handle all three on the track at once. One train was used as a spare, and occasionally only one is on the track during normal operation. In the 1990s, one train was dismantled to supply parts for the remaining two. Eventually, the park obtained trains from the former Schwarzkopf-designed Viper at Six Flags Astroworld. The trains have seven cars, each with four seats arranged in rows of two for a total of 28 riders per train. Passengers are restrained with a single ratcheting lap bar.

The transfer table, located between the station and the lift hill, is used to move trains to and from the maintenance building. It features one brake to secure trains in place as the table rotates; it is not used during normal operation. There is also a feed motor located on the transfer table.

The primary set of brakes that stops the trains' movement at the end of the ride are known as the reduction brakes. As a result of having no overhead protection from rain, wet conditions can cause unwanted slipping. The ride occasionally closes when these conditions become severe.

There are two sets of trim brakes on the course of the ride that reduce the speed of the train. The attraction is placed on the side of a ridge, and portions of the track – including the second vertical loop and a helix – are located in an adjacent ravine, increasing the attraction's overall elevation change. The coaster used to be advertised as a "triple looper". The ride features two vertical loops with a diving helix which doesn't actually result in an inversion sometimes considered the third loop.

The ride begins with the train exiting the loading station, passing over the transfer track and climbing the lift hill. Once the train has reached the top of the lift, it turns right into a U-turn while traversing slightly downward. When the train nears the end of the U-turn, it travels sightly upwards nearing the height it was when it reached the top of the lift hill. The train then descends down the first drop and immediately enters the first loop. Upon exiting the loop, the train climbs a hill, levels out and reaches the first set of trim brakes.

Next, the train turns left in a slight decline before leveling out. Once leveled, it enters the diving helix into the ravine. This is achieved by the left rail lowering much more steeply than the right rail as the train descends into a left-turning helix. The train begins to climb and level out after reaching the bottom of the ravine, producing significant positive G-forces. After exiting the top of the helix, the train enters a hill followed by a U-turn and a second set of trim brakes as the track levels out.

The train then travels down another hill toward the ground and into the final loop. Upon exiting, the train passes through a tunnel and over a hill into another descending U-turn. The train ascends slightly as it completes the U-turn and enters the final brake run.

On June 3, 1984, a mechanical problem caused a train to stop abruptly, sending four people to a hospital. The ride was repaired and put back into service with no more problems.[2]

• Incidents at Six Flags parks

• Official website