Send in your picture. Reach out to someone today and say, “Hey! Have you heard about the Gravity Challenge?” And when they ask, “No! No I have not!” Look at them and say, “Too bad, too sad. Guess you’ll never experience the….. er, experience of knowing how another person actually feels about a thing in life (well, a small thing, or better to say, a very precisely defined segment of life, but still!).