 The coaster replaced "Water Street Cab Company" (Bumper Cars) and operates under the name Boomerang in the "Illinois" section of the park with a new orange and green color scheme.Boomerang is the ninth coaster at Six Flags St. Louis, helping the Six Flags park become the park with the most coasters in the state of Missouri.Construction of the coaster began in early 2013 at the former site of Water Street Cab Company, with "Boomerang" track arriving at the park on February 11, 2013.