The Joker, Steel roller coaster at Six Flags México, Mexico City, Mexico.

The Joker is a steel spinning roller coaster at Six Flags México in Mexico City. It uses the compact Gerstlauer 400 model, 48 feet (15 m) tall, with eight four-seat cars that spin freely. Its layout runs through seven segments separated by brakes, including a swooping drop, S-shaped turns, a heavily banked figure-8, a semicircle of hills, a helix and a long loop into a final hill.

The ride was originally built in 2008 at Six Flags Discovery Kingdom in California under the name Tony Hawk's Big Spin. It was relocated to Mexico City in 2013 and renamed.

The Joker takes its name and theme from the DC Comics villain, Batman's rival, and the ride's purple and green colouring reflects that character. The coaster was repainted from the red and black of its earlier identity. Near the ride, an exterior tent is marked "Tunnel of Love TERROR!", a detail visitors can spot while queueing.

The Joker is the only Gerstlauer 400 model in operation; its track stands 48 feet (15 m) tall and is more compact than the 420 version. The circuit is split into seven segments separated by brake runs, from a swooping drop and S-shaped turns to a banked figure-8, a helix and a final large hill. The ride lasts about 1 minute 21 seconds.

Each of the eight cars spins independently based on track angles and how weight is distributed among riders. This means no two journeys are exactly alike, as the rotation and pace of each car varies with every run.