In the penultimate (rooftop shootout) scene, when Sandy is shot, he slumps with his head just below and on the inside of the walkway's outer rail (oddly - because there's nothing to hold him up and he clearly should have fallen to the floor). But in the next shot his head is on top of the rail and facing outwards.
When Eddie Spanier (Robert Stack) is first knocked unconscious by members of Sandy Dawson's gang, Dawson tells one of his underlings to awaken him by tossing a bucket of ice on him. As he lies on the floor, however, Eddie flinches as soon as Dawson gives this command, before any ice actually hits Eddie's face.