The moviemaker introduced sex toy 'Big Jerry' on the first day of shooting and then posted pictures of sleeping stars like Brad Pitt and Diane Kruger, with the dildo, on a daily Board of Shame.
Actor Michael Fassbender admits he was one of the only castmates not to make the board - because he found ways of sleeping in secret.
He tells WENN, "Big Jerry was a giant purple dildo, very large in girth and length. Basically, anybody that was caught going to sleep would get photographed with Big Jerry the dildo somewhere near their face and put up on the Board of Shame. The idea was three strikes and you're out.
"This kind of really worried me because I have a tendency to nap. If I have 10 or 15 minutes you'd find me in a corner underneath something but I never got caught.
"Brad (Pitt) was up there once on the Board of Shame, Gedeon Burkhard got caught twice, Diane (Kruger) was on the board... There was a lot of people on that board.".