to Michael Caine “ Film acting is, in large part, reacting and listening and a majority of movie acting is relaxation.  If you’re knocking yourself out, you’re doing it wrong.”

Film acting is much more detailed and nuanced than  television. Casting directors frequently tell actors auditioning to do less. Even emotionally charged scenes can be very subtle. This is often where many coaches and casting directors  say confusing things like “stop acting”