Monday marks 30 years since The Steel Phantom opened at Kennywood Park.Watch our archive video from 1991: Click the video player above.Back in 1991, the original Phantom was the world's fastest, steepest roller coaster.It took riders screaming through a vertical loop, a corkscrew and a batwing, reaching a speed of 80 mph along the way.Years later, the inversions were removed from the coaster and it got a new name: The Phantom's Revenge.