Behind the scenes at Six Flags’ new 4D free-fly coaster The Joker

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

GURNEE, Ill. -- A new rollercoaster is coming soon to Six Flags Great America and thrill seekers are in for a twisted ride.

WGN's roller coaster enthusiast Marcus Leshock got a behind-the-scenes look at the construction of the park's new 4D free-fly coaster called The Joker.

Six Flags opens April 29, and The Joker should be ready to ride by Memorial Day weekend.

Notice: you are using an outdated browser. Microsoft does not recommend using IE as your default browser. Some features on this website, like video and images, might not work properly. For the best experience, please upgrade your browser.