In the first 10 minutes of the movie, where it was still based on the year 1978, young Wayne was seen taking a gun out of one side of a sneaker. The sneaker was a black and white Air Jordan 12 which would not appear to the shelves until the fall of 1996, some 18 years later.
At the very end when Wayne got shot, you can see Errol going towards him and there is a body on the stairs. The body's left leg changes position during scenes.
When Biggs, Wayne and Mad Max rough up Teddy Bruckshut in the restaurant, Mad Max pistol-whips one of Teddy's goons, who is seen bleeding profusely. Later in the scene, the goon is shown unharmed.