Six Flags Great Adventure is set to launch a highly anticipated addition to its collection of world-class attractions: The Flash: Vertical Velocity. Opening this spring, the park’s newest roller coaster promises to deliver an unforgettable ride, combining forward and backward launches, four intense inversions, 10 airtime moments and a top speed of 60 mph. The combination of these exhilarating elements marks America’s first “super boomerang” coaster.