If SROS is "notoriius" for the reasons given above, then KW's Thunderbolt would also be as well. This ride had a fatality back in the 1960s when a rider was thrown from the train. The result was the "No single rider" rule that remains in effect now. Thunderbolt also had a station brake accident a couple of years ago that resulted in a number of injuries. The lateral G-forces in the helix of Tunderbolt are so strong that the heaver rider in each pair is required to ride on the left side of each seat (as is befitting of an ACE classic, there are no seat dividers).
Thunderbolt got national attention back in the 1970s when a columnist ranked it as the top coaster in North America. It held this honor on his list until Six Flags Astroworld's Texas Cyclone (no coffin cars in those days) displaced it. Thunderbolt is still highly regarded but has lost rank in many coaster critic's lists as newer woodies have been built over the years such as the Beast, Boulder Dash, and the HW coasters.
