a joke A fourth grade teacher was giving her pupils a lesson in logic. Here is the situation, she said , a man is standing up in a boat in the middle of a river , fishing 。 He loses his balance, falls in , and begins splashing and yelling for help . His wife hears the commotion, knows than he can`t swim, and runs down to the bank. Why do you think she ran to the bank? A girl raised her hand and asked, to draw out all of his savings?