Kingda Ka at Six Flags Great Adventure is currently the tallest and fastest roller coaster in the world.

Towering at 456ft and reaching speeds of up to 128mph in 3.5 seconds, this scream machine (manufactured by Intamin) is sure to leave even the most daring of thrill seekers breathless.Show what a daredevil you are by downloading this exclusive Kingda Ka screensaver featuring classic pictures of the roller coaster in action!