Living: Roller Coasters... Eeeeeyyooowiiii!!!

A new generation of roller coasters is scarier -- but safer -- than ever

From the crest of the first towering hill on the new Texas Giant roller coaster at Six Flags Over Texas, riders can enjoy a glittering view of the Dallas skyline 16 miles distant. But few manage to look at it. They are staring down in horror at the gaping 14-story plunge awaiting them. As the red, white and blue cars slide slowly over the edge and then barrel down the $ 137-ft. incline at 62 m.p.h., the screaming riders begin 90 seconds of tightly orchestrated horror.

Tearing out of the first dip, they reel from the force of 2.7 Gs --...