The camera angle that looks up at a character from below their shoulder level isn't one that's used overmuch in film. I'm by no means a historian of camera technique, but I know that Orson Welles garnered applause for using it to emphasize the power and stature of the lead character in Citizen Kane, even going so far to pry up the floorboards in some of his locations so as to put his camera literally below the ground level, giving us the impression of looking up at a God.
Tarantino uses the shot a lot, as the above cut should impress upon you. Sometimes its used rather literally, as when we get the point-of-view of young Butch Coolidge as he listens to a man tell him about his new ass-watch, but he uses it in a variety of ways and circumstances. Do you know of any other modern directors who use it as often as he does?