How come someone with crutches outpace an uninjured person?
Some folks have “love handles.” If you are such a person, take heart, the entire planet suffers from this same indignity. Learn more on this Moment of Science.
Ever wonder why it's so hard to carry open beverages without spilling anything?
The windmilling motions of the arms are also fast forward rotations. Making some parts of the body rotate faster causes other parts of the body to rotate more slowly to compensate.