DODOMPA

This is the Guiness Book of World Records holder of the fastest roller coaster in the world. It's located at the foot of Mt. Fuji in Japan.
Maximum speed 172 km/hr (in 5 sec)
Course length 1189 meters
Ride time 60 sec
Maximum acceleration 4.25 G
Tallest point 52 meters
Maximum drop angle 90 degrees