You and the smart girl in your class were on a carnival, riding the highest rollercoaster there. The moment the ride started going up, it was all fun and games, but as soon as the rollercoaster rushed downwards with a speed that made both of you fear it might go up in flames due to friction and plummet through the sky like a meteor about to hit earth, her face turned green and her big brown eyes gave you a look that downright screamed: "Dude, I'm about to blow chunks." You knew she got sick from high speeds.