A well-known actor and television crew, filming a travel documentary, were driving south in Africa when they were approached by a local citizen as they neared the equator. He offered (for a fee) to demonstrate the change in swirl direction of water in a hand basin. They all walked a few minutes north of the equator, he filled the basin with water, removed a plug in a hole in the middle of the basin, and sure enough, the water swirled counterclockwise as the water drained out. They then walked a few minutes south of the equator, repeated the experiment, and the water swirled clockwise this time as the water rushed out. It would have been interesting to learn how much the local man made demonstrating his skill over and over for equator-crossing tourists! How might the local man have produced the result?