Opening shot, big dice
Fun Hollywood trickery in the very first shot. Dice are tossed at the camera and ultimately fill the screen in a huge close up. Then the camera pulls back, the dice go out of frame and then we see them tossed again.
When they filmed this scene, the first dice they threw toward the camera actually were huge, about 6 inches square achieving a nice effect that would have been a depth of field and focus problem with normal sized dice. When they go out of frame they switch to normal sized dice. Watch it, it's a fun trick.
I don't know who's idea this was but I just realized today that the cinematographer for this film, Rudolph Mate, later became a director. He directed, among other films, "DOA" the 1950 noir classic with Edmund O'Brien.