When Allen is in the lecture theater, the writing on the blackboard behind him switches a few times from saying 'maths 220' to 'maths'.
In the scene where Allen is in hospital on the day of his release, the white sheet on the bed slips down and then is magically back up again. This happens several times.
In the scene where Allen is looking for Rose, he stops his vehicle and hops out while the windshield wipers are still going and shuts the vehicle off with the wipers in the 'up' position. In the next shot, the wipers are down.
The scene of the accident is described in dialogue (particularly by Grace Brewer) as having surveillance cameras which recorded the crash and its aftermath, and Jordan Walker, the driver who smashed into Bennett and Rose, claims that he "had a green light", clearly referring to an intersection. Yet when the Brewer family and Rose visit the crash site, it is on a narrow country road in a wooded area, with no intersections, traffic lights or cameras in sight.