On the set of Zodiac, Fincher recalls, that he walked on set to find what he called “a hoard of girls waiting in a line in front of a
trailer earmarked for Robert Downey Jr. So I walked up and knocked on the door because I found it unprofessional to have all these,
let’s call them groupies to be nice, on set. And when the door opened a girl left and standing in fully naked was not Downie, but rather Jake.
I was taken aback, but Jake only said one word, and I believe it was not for me. Jake said ‘next’ and the girl at the front of the line entered the
trailer and Jake smiled and closed the door.”

When we asked Jake about this his reply was ‘RDJ was visiting his dad.”