Kingda Ka, which opened last summer, is the world's tallest and fastest rollercoaster. Riders rocket from zero to 128mph in 3.5 seconds before being catapulted 456ft into the sky. They are then sent spinning back down to earth through a terrifying twist. Jeremy DeLong, a sailor from Virginia, paid 1,074 in an eBay auction to become the 13million rollercoaster's first official rider.