The Four Questions Are in the Air
What is Dave wearing today? Dave’s wearing a red shirt and gray shorts.
How does Dave feel today? Dave feels a bit nauseated.
What are the factors affecting Dave’s mood? Dave has motion sickness. He is currently traveling at 67,000 miles per hour.
Wait, what? Dave explains that we are all moving at the same speed—that’s how fast the earth moves in its orbit around the sun—and wonders why he doesn’t suffer from motion sickness more often.