The first demo video of the world's tallest roller coaster is terrifyingCasey Chan11/18/14 11:59pm9516EditPromoteGo to permalink The world's tallest roller coaster won't even be made until 2017 and this is just a demo video of what the roller coaster is going to feel like but I'm already scared. Skyscraper at Skyplex in Orlando will be the tallest roller coaster in the world at over 500 feet tall and you ride the thing all. the. way. down.