I am looking for a book in which a father in France tells his son how he and a friend (or 2) were up to some mischief during WWII and were captured by a German soldier and held in a pit, but later somehow released. After telling this story, the father tells his son that they are going to see a movie. The movie they see is “The Bridge. ” It turns out that the German soldier who held them in the pit was Bernhard Wicki, who directed the film.