Dogville Confessions.
if anyone has the chance to see this documentary, see it right away. Not only it's brilliantly shot and edited , but it gives you a decent insight to what working with Lars Trier might be, without gloryfing him. There is a bit, where Ben Gazara (probably the most pissed-off actor in the set) is in the confession booth and he mimmicks a traditional Catholic confession and then says something like "Blessed me father , for I have sinned. I haven't had a confession since 5 years but I promise this is the last time I'll work with an insane director".