patented new construction technique manipulates wooden tracks into shapes never before seen, with inversions, over-banked curves and whip-crack reversals of direction.]]> retrofit two coasters in Texas - though one site was marred by the death of a person who fell off the ride last summer.]]> treacherous, the crew members had to stop frequently to recover in warming shelters, cutting down productivity by more than half, supervisors said.]]> ensure that riders can tolerate forces exceeding three times the pull of gravity.]]> eternity.]]> commonplace forms of commercial and residential construction.]]> technique manipulates wooden tracks into shapes never before seen, with inversions, over-banked curves and whip-crack reversals of direction.]]> eternity.]]> friction.]]> hurtle riders at 72 mph down an 85-degree, 180-foot cliff before rocketing them into hairpin curves, two upside-down twists and a zero-gravity stall to make passengers feel momentarily weightless.]]> attraction will set three records for wooden roller coasters.]]> ensure that riders can tolerate forces exceeding three times the pull of gravity.]]> tolerate forces exceeding three times the pull of gravity.]]> absolutely brutal."]]>