Ask them what happens when it’s third-down, bases loaded, and they only have twelve parsecs left on the clock. Boy will they look foolish.

You have 4 tries (downs) to move the ball forward 10 yards. If you succeed, you get 4 more tries to do it all over again. Repeat until you get the ball to the end of the field and score a touchdown, or fail and give the ball to the other team so they can try.