In 'Shutter Island' (2010), every time Leonardo smokes in the film he gets his cigarettes lit by someone else. This shows he was a patient because mental patients are not allowed to have matches.
In "Interstellar" (2014) on the water planet, the soundtrack in the background has a prominent ticking noise. These ticks happen every 1.25 seconds. Each tick you hear is a whole day passing on Earth.
