When Debra starts to choke, Ray puts his hand behind his head in a fist-like gesture. In the next shot, his fingers are spread out.
When Ray, Marie and Frank talk in the kitchen about how tough Ray is, the hand he holds his sandwich in and the amount and placement of bites keeps changing.
When Ray has Debra pinned down on the floor, in overhead shots a studio light is reflected in the hardwood. In side shots, this reflection is not visible.