...which was done by Kurosawa in Rashomon six years earlier - not in real time, but the story re-told from different points of view.
The idea has been copied a good few times since, of course, notably in Reservoir Dogs.
EDIT: You might say the same narrative structure was also evident in Citizen Kane, and indeed Kubrick's The Killing was compared to the work of Orson Welles - similar uses of camera work especially.