Two men are approaching each other on a sidewalk. Both are dragging their right foot as they walk.

兩個人在人行道上分別拖著自己的右腿，相向而行。

As they meet, one man looks at the other knowingly, points to his foot and says, Vietnam, 1969."

他們相遇了，一個人理解地看著另一個人，指著自己的腿說：“1969年，越南。”

The other points his thumb behind him and says, "Dog crap, 20 feet back."

另一個人豎起了大拇指，說“再走20英尺，狗屎?！?/div>