Other mistake: At the carnival, you can see an African-American man staring at the camera for a while. I am unsure if he is a crew-member watching over the scene, or if he is just an extra trying to get onscreen.
Other mistake: In the slaughterhouse scene, after Harrigan has injured the Predator with his shotgun and Keyes reappears, the Predator throws its disc, and severs Keyes in half at the waist. We see his legs flop to the ground, and blood pour from above, but his upper half (torso, backpack and weaponry) mysteriously remain hovering out of sight. (01:21:50)
Other mistake: The female journalist is called Samantha Coleman through the movie, but appears in the credits as Samantha Copeland.
Other mistake: When Seagal is in the factory in Jamaica, a "Jamaican" bad guy jumps up from behind a barrel, you can see that he is in fact white - you can see the make-up line on his neck, and his wig is crooked.
Other mistake: When Robert Downey Jr. lowers the helicopter onto the freeway to yell at the truck driver, he is very close to the truck driver, so close that the truck driver can even hit the helicopter. Why does a long haired man standing underneath a helicopter not have his hair blown around?
Other mistake: When Marty returns to 1985 from 1885 the time machine is destroyed by a train. What is strange is that not only does the train not stop (which is mandatory in the event of an accident) but there is also no reaction from people nearby, such as those in the vehicles waiting to cross the track at the level crossing. Later, when Marty returns to the site with Jennifer, there is still no sign of police officers or other officials.
Other mistake: Why do the good guys keep shooting 2.75in unguided rockets to kill the enemy aircraft? These are designed to kill lightly armored vehicles and trucks on the ground. You would have about as much luck with those as with chucking rocks at planes. There are infared (heat-seeking) Stinger missiles on the wing pylons, we see Billie pull one off and attach the hand held unit to shoot down a jet. Why aren't they using those?Grumpy Scot
Other mistake: A fast editing makes a double kick on the face all the more impressive not to mention impossible. Get the pause button ready. (01:08:00)
Other mistake: In the music within the ending credits, the lyrics incorrectly state that Raph is the leader of the group when all Turtle fans past and present know it is Leo.
Other mistake: After the drivers enter their cars at the Daytona 500 at the end, there is a shot where Russ Wheeler's #18 Hardee's car is in the inside lane and mid-pack a row ahead of Cole's car on the outside. In the overhead shot as they get the "start your engines" command and the shot immediately following, you see Cole on the inside and Russ on the outside of the last row. This is compounded because they show Russ looking to his right and Cole to his left at each other indicating that they have reversed sides again. Also, Russ starting mid-pack would not be feasible and back of the pack unlikely since they said he won the pole. Even with the Duels races setting up the lineup, the front row qualifiers still stay the same at Daytona. Russ could be at the back if he made changes to his car (which Cole did). Not sure if either of those rules were different in 1993. Along the line of the Duels, the plot seems to imply it is Cole's first time back in the car and he is nervous. However, he would have run in practice and his duel race already by the start of the 500.
Other mistake: After Arnold kills Harry and his gang at the beginning, how did that blood splatter get on the wall behind him to his right? He shot the henchman standing in that position from the back and the other who was shot was shot standing to the left side of the wall. So there is no explanation why the splatter is there.