The key to the thrill ride of the future is a robotic arm that replaces the traditional roller-coaster car. British engineer Gino De-Gol adapted the Kuka KR 500, a 5,000-pound aluminum robotic arm, by attaching a passenger seat to the free end. The arm has six joints that allow it to articulate acrobatics as wild as a programmer can dream up. To make his RoboCoaster a reality, De-Gol needs to build a track that can handle the cantilevered load of the KR 500. Here´s a video of the arm in action: