Continuity mistake: When Max and Annie are talking about whether to invite Gary to game night, after Annie says that Gary has got worse after his divorce, Max turns and looks at her RIGHT before the shot ends. But in the very next shot, suddenly he is facing down and away from her.
Continuity mistake: When Gary points out that Max and Annie have three bags of Tostitos chips, watch the bag in Max's hands. Before Gary says his line, everything is pushed down relatively far, with only the very top few inches of the chips and some celery visible. After Gary's line, when it cuts back to Max and Annie about two seconds later, suddenly the chips and celery are all sticking much higher out of the bag.
Continuity mistake: Max's shirt (left arm) is dripping with blood while the crew is at Gary's house, and he (Max) is using Gary's computer. Later in the movie there is no blood on his shirt.
Continuity mistake: Max dripped blood on the dog from his elbow and the dog had blood in a large spot behind its neck and left shoulder area. In next frame the dog is shown with blood in the spot and all down its left leg. (00:58:00)
