Currently reading The 50th Law, by Robert Greene, and felt this anecdote was too good not to share.

About director John Ford:

Once, when the famous producer Samuel Goldwyn visited the set, he told Ford he just wanted to watch him work (a producer’s way of spying and applying pressure). Ford didn’t say a word. The next day, however, he visited Goldwyn in his office and just sat silently in the chair by Goldwyn’s desk, glaring at him. After a while Goldwyn, exasperated, asked him what he was doing. He just wanted to watch Goldwyn work, Ford answered. Goldwyn never visited him again on the set and quickly learned to give him his space.