Visible crew/equipment: When the leader of the Riffs' finds out it wasn't the Warriors who killed Cyrus there is a focused shot on his face and his sunglasses reflect a crewmember wearing a white T-shirt next to what looks like a camera. It has to be a crewmember as no-one in that scene is wearing a white T-shirt.
Continuity mistake: When the 'Punks' first come into the bathroom looking for the 'Warriors', there is a panning, establishing shot of the whole bathroom. All three of the big mirrors in the bathroom are already broken, and the only thing left of them is the dark-colored backing material hanging on the wall. As the fight breaks out, several of the gang members are subsequently thrown against now-unbroken mirrors, shattering them dramatically.
Continuity mistake: In the Coney Island scene near the end of the movie, where the car that The Rogues are tailing The Warriors in stops, in the background shot you can see that the elevated boardwalk adjacent to the car is located about the same level as the roof of the car, and is ascending upwards towards the front of the car. In the next scene with a closeup of Luther clinking the bottles in his hand, the boardwalk is all of a sudden located much lower at the car seat level and is now descending downwards towards the front of the car.
Continuity mistake: In the opening scene where the Warriors are talking amongst themselves, the shot shows Ajax say to what is presumably Vermin (due to the curly hair, necklace and the fact he's taller than Ajax) "Maybe we'll get to waste a few heads along the way." The shot then flips to show Cleon, not Vermin, who responds "You just soldier and keep your mouth shut." The shot once again flips to show Ajax and the back of Vermin's head.
Other mistake: The gang gets separated after an intense cop chase through the subway station and Cochise, Rembrandt, Vermin escape aboard a train and end up in Union Square. The guys step out onto the corridor to an empty platform, as Rembrandt comments that nobody has shown up. Vermin then grins and says "Something else just showed up!' as a gang of girls suddenly appears, standing by a stairwell, that wasn't there, across the tracks, in the same direction. (00:50:50 - 00:51:55)oprlvr33
Factual error: In the opening sequence highlighting the journey made on the subway; it ends with them riding the 5 Train to the end of the line in The Bronx. This would place them next to Pelham Bay Park on the Northeast corner of The Bronx. However, it is believed that the meeting took place in Van Cortland Park on the Northwest corner of the Bronx. If the meeting were held in Van Cortland Park they would have taken the 1/9 Train (s) which end at 242nd St. and Broadway right outside of Van Cortland Park. The 5 Train station would be about a 15 minute cab-ride from Van Cortland Park; and they didn't take any cabs, and they sure didn't walk that distance either.
Other mistake: At the end when the Rogues show up to see if the Warriors want to play, Swan says he'll lead them to the sand. He asks the rest of the crew if they're all packed, and when Snow asks the same, Swan pulls out a switchblade. Where did he get it? They were supposed to be unarmed when they headed up to the Bronx. If he broke the rules and had it the whole night, I would think he might have pulled it earlier while bopping his way back to Coney.
Continuity mistake: Rembrandt's hair constantly changes throughout the movie from fluffy to a more cut style.
Continuity mistake: The gang members' shadows during the Coney Island scene change from shot to shot. In some shots they are to the side of the actors and in others behind them.