Imagine accelerating from 0 to 128 mph in 3.5 seconds and then hurtling over a 45-story building in a go-kart. You crest a hill, experience weightlessness and then G forces plaster you to your seat. As the ride ends, dopamine floods your brain. Every rollercoaster conspires with physics, geometry and precision engineering to jump start your brain chemistry and shake up your basic instincts. Why do we get such a rush out of roller coasters? What will the next generation of Supercoasters unleash