シックス・フラッグス
The Joker is the name of four spinning roller coasters currently operating at four Six Flags amusement parks in the United States, those being Six Flags Great Adventure, Six Flags Great America, Six Flags Over Texas and Six Flags New England. Built by S&amp;S – Sansei Technologies, an American ride manufacturer, each of these steel coasters are versions of their "Free Spin" model. Since 2016, Six Flags has installed The Joker in four of their parks.