 Shockwave was closed in 2002 and has been dismantled.Shockwave was designed by Ron Toomer at Arrow Dynamics, and its seven inversions set a new world record among roller coasters previously held by Vortex at Kings Island, which opened a year earlier.In 1989, Great American Scream Machine debuted at Six Flags Great Adventure, which featured an identical layout but with an additional in height and a faster top speed of .