United Kingdom, Feb. 17 -- Sir Sam Mendes has "no outlet" during a film shoot.

The acclaimed director loves his work, but Sam isn't able to fully express his thoughts and feelings on set.

Speaking to Chloe Zhao at a screening in London, Sam explained: "You're rolling a camera and there's an actor giving something amazing, and you feel triumph and excitement and the heart starts to beat faster, or whatever it is, however you manifest your moment of creativity and discovery, but you can't say anything because you'll ruin it. You'll f*** up the take."

Sam, 60, is currently working on The Beatles - A Four-Film Cinematic Event, a series of interconnected movies based on the lives of each member of the Beatles, and he recalled a recent incid...