Continuity mistake: When Martin is confronting his neighbor about taking his shoes off, watch the bedroom door closely behind Martin when the neighbor says "I shouldn't have done that, huh." Tommy in a yellow shirt can be seen walking out of the bedroom door. As soon as we see this there is a knock at the front door and it's Tommy and Martin is all of a sudden seated. (00:06:55)
Continuity mistake: Everyone drops to the ground and ducks when they believe that they heard gunshots. The microwave beeps and Tommy says it's just his popcorn. When he takes the bag out it is white, but immediately afterward it is red. (00:13:20)