Six Flags Great Adventure in NJ is opening the world's tallest and fastest roller coaster this spring — a thrill ride that accelerates to 128 mph in 3.5 seconds and rises 456 feet off the ground. COASTERS I love rollercoasters and only started riding them 4 years ago. Now that I overcome my fear of riding them, I am a little addicted to the thrill and rush of bigger and better coasters. I especially loved the one in Florida Islands of Adventure that hangs under the tracks...called Dueling Dragons. And Mr. Freeze at 6 Flags over Texas. Do you ride them? Are you scared to try it?