- David Fincher: Robert Downey actually came up to me [on the set of Zodiac] and said "I can't work like this, I never get to go to my trailer and get my shit together. I'm on my feet 14 hours a day. Im shooting ALL the time." Robert would actually just leave mason jars of urine on the set over in the corner. He would actually just go and comeback and leave the jars on set. It was kind of like his form of protest.