The Postman Always Rings Twice has one of the most famous character introductions in the history of film.
John Garfield, playing the drifter Frank, arrives at a roadside diner on a hot summer day and orders a burger. The owner of the diner, Nick, runs out to pump some gas leaving Frank alone in the diner. Suddenly a lipstick roll across the floor towards him. Frank (and the camera) looks back to see where it came from. All you see is a bare set of woman's legs. The camera cuts back to Frank who literally looks like the breath has been knocked out of him. Then there'... read the rest.