Actors who have "things" they do in films
Many actors develop signature on-screen habits or mannerisms that become recognizable parts of their performances.
Like Tom Hanks pees, Tom Cruise runs, Brad Pitt eats, Nicolas Cage freaks out, John Wayne would light a cigarette off the top of an oil lamp, Meryl Streep will cry, Sean Bean will die.
What other examples have you guys got?