That’s according to Dr. Gary Paige from the University of Rochester Balance Clinic. The cups spin and rotate for 90 seconds, while your inner ear tries to make sense of the movement. Except for ballerinas and figure skaters, it’s not a sensation we’ve adapted to, so it confuses our brain’s sense of orientation. If your kid demands you go along for the ride, do this: Close your eyes. Because vision will make your nausea worse. And when the ride is over, sit there for a minute before you get up. That allows your brain and inner ear to come to a full and complete stop, so you’ll be less likely to fall over when you stand up… and less likely to lose your lunch.