Thinking that the mice could play while the cat was away, her students once gave her two tickets to a children's movie. They figured that she would take her son.
有一次，學生想出一個調虎離山之計，送了她兩張戲票，慫恿她帶兒子去看戲，這樣做實驗時耳根可以稍微清淨些。