Some things in this world don’t require much explanation for them to make sense to just about anyone. On the other side of the coin, there are certain situations that are difficult to explain to another person. It’s hard because even the expert doesn’t seem to understand what he’s saying.

Among the easy ones is the recommendation to not walk suddenly behind a horse. If you violate this law of nature, Plaster of Paris will become a very big thing in your life the next five to eight weeks. Another fairly simple direction is not to crawl under your pickup when it is held in the a...