Pow Camp Puns

My grandpa would always tell me this story about his uncles in WWII. "My uncle was actually captured by the Germans and kept in a pow camp. They would try to break the prisoners spirit by making them to mindless things. One in particular they would make the prisoners stand in a line and all move their heads like a clock back and forth and say, 'tick tock tick tock.' My uncle was always a wise guy so he would rebel in the simplest way. He would only go, 'tick tick tick.' One day the guard finally caught him and said, 'don't vorry. Ve have vays of making you tock.'"