 Boomerang was one of the first Boomerang coasters built in the United States.It was designed and built by Vekoma and opened at Six Flags Over Texas as "Flashback" in the 1989 season.Vekoma's generic Boomerang model was sold to numerous amusement parks in the United States including Knott's Berry Farm, Hersheypark, Lake Compounce, as well as all the parks owned by Funtime and Premier Parks.