Once the world's fastest roller coaster, Dodonpa, to this day, still has the fastest accelleration of any coaster, reaching its top speed of 106.9 mph in just 1.8 seconds! The launch is followed by a huge, sweeping, overbanked curve, giving riders a chance to catch their breath back, before they hit the 170 foot top hat; an element with some extreme negative G forces. One of the most insane, intense coasters you are ever likely to experience!