When Helen goes out trolling for trade, she steps out on a brightly lit Broadway, surrounded by a bustling Times Square, but when Zach shows up behind her, the sidewalk is dark and deserted, except for a crowd of fans behind a barricade in the distance.
After Tommy shoots Zach on top of the airport carousel, his shoes are completely different as he attempts to escape.
When Tommy stabs Palermo with an umbrella at Coney Island, the next shot featuring the squib/wound is clearly animated.
After Tommy locks the dead guy in the airplane bathroom. He notices the guy's shoes on the floor and tosses them aside. This was an unplanned moment because during filming, Williamson knocked the guy over the chair so hard that his shoes came off.
When Tommy shoots one of Zach's henchmen in the eye, you can see the squib bottle exploding in the next shot for a split-second.
When Tommy is ambushing DiAngelo's men in the park, many of the people in the scene, including the hot dog vendor, are casually watching the assassination in delight, while in real life they would be running away in fear.
When Tommy and Zach are fighting on the luggage carousel at the airport, it is obvious that the people are just watching the fight casually, especially when Zach's dead body falls back into the carousel and the people are just seen doing nothing.
At the end, when DiAngelo orders Tommy and Rufus to put their guns down or he will shoot Tommy's son, we cut to a close-up shot of DiAngelo's eyes, but it is very clear that it is not the real actor's face.
When Papa Gibbs shoots the guy in the subway train, the passengers are seen sitting there doing nothing, but this does not really count as a goof as this was just a way for director Larry Cohen to kill off Tony King (who plays both Zach and the subway guy), who did not follow Cohen's instructions most of the time during filming.
When Tommy asks the man at the airport front desk when there is another flight to Los Angeles, the mouths of both men do not move.
Tommy's dialogue in the cab sequence doesn't match his lips because all of the dialogue was recorded in a studio in Hollywood.
On the DVD release's English mono track, one scene at the mansion massacre features more gunfire instead of the women screaming and the sound of one of the gunmen falling to the ground.