The Most Swirling, Swinging, Sliding, Spinning, Up-and-Down Ride of Your Life

Q.E.D. looks at the science behind the thrill machines. Discover the best seat on a roller-coaster, the fun of becoming five times heavier in as many seconds, the speed of a fall that's so fast there's no time to scream. Hold tight and prepare yourself: you'll be spinning upside-down, looping the loop while standing up and dropping so fast that you've no idea where your stomach is.