Le Trou (planning)
So what is my verdict of this enterprise?
First, here is an excerpt from Bosley Crowther's 1964 New York Times review of the film: "The task of hacking through the concrete floor is not a passing effort that is told with a quick few shots and a few dissolves. It is made into a tremendous labor of many minutes of hacking and scooping out debris while one of the men watches for the guards and all exhaust themselves completely before the whole is broken through."
Le Trou (timing)
Sadly, Becker died shortly before the film was released in 1960.
Le Trou (digging...lots of digging)