The minigun that the Terminator (Arnie) uses in the Cyberdyne scene was so heavy that Arnold Schwarzenegger was the only person on set strong enough to lift it.

While the characters were running around a hot steel mill, in reality the temperatures in the mill averaged only about 40 degrees. The actors had to be consistently spritzed with water to make it look like they were sweating.

When the T-1000 tells a man in the helicopter to "Get Out," this is the same thing the Terminator says in the first film (1984) when he takes the 18-wheeler. It's also used in T3.

When the 1000 robot follows them in the helicopter, we can clearly see that he has 3 arms when he is loading his gun with 2 arms and steering with the third. OK, it might be able to generate arms at will, but worth a look...

Eddie Furlong was warned, at the very beginning of the scene where he rides out of the mall and the T-1000 is chasing him, that Robert Patrick could run exceptionally well. Furlong confidently said that Patrick wouldn't catch him. However, on the very first take, Patrick ran right up and tapped him on the shoulder. So if this was real life, the human race would be in trouble.

In the shot where the SWAT van skids across the floor of the Cyberdyne main lobby and ends up with its back end against the elevator lobby, the tile floor was so slick that an industrial adhesive was sprayed all over the floor to allow for greater control.

Makeup artist Jeff Dawn has said that in order to give the Terminator (Arnold Schwarznegger) a look that set him apart from the other "human" actors, the makeup artists "mixed in a little bit of K-Y Jelly into the straight make-up, to give him that 'I'm different-looking but you don't know why' look...It's a sort of plastic-man appearance."

Early in the movie after the chase, between Arnie and John (riding a bike) and T-1000 (in the truck), the truck explodes. Arnold then aims his Winchester, waiting for the T-1000, but he does not come out of the fire and Arnold puts the gun down without looking. The Winchester passes so closely from John's head that you can see it brush his hair. In another take, he actually got hit by Arnie - he's said so in interviews.

Note that, even when running, T-1000 never breathes through his mouth. Breathing through his nose helped Robert Patrick make his character look mechanical.

The scene in which the T-1000 commandeers the police chopper at Cyberdyne and, while still in his liquid metal form, orders the copilot out, was the first time a fully computer generated character in a movie spoke.

After the T-1000 throws the Terminator through the window in the mall, a shocked man is seen shooting photos with his camera. This man is Bill Wisher, a friend of Cameron's and co-writer of the script. Wisher also appears in "The Terminator" - he's the cop whose car the Terminator takes after the Tech Noir shootout ("One-L-nineteen").

An unknown Edward Furlong (John Connor) who had never acted before was discovered by casting director Mali Finn at a boys' club in Pasadena, California.

So that he didn't have to use a split screen, director James Cameron hired twins to play the security guard and his T-1000 double at the hospital. Linda Hamilton's twin sister Leslie Hamilton Gearren was used in the scene where the T-1000 is disguised as Sarah, although as the focus is on the T-1000, in those shots Linda Hamilton plays the robot with her sister playing Sarah.

Actors Robert Patrick (T-1000) and Joe Morton (Miles Dyson) would reunite more than 10 years later on Fox's 'The X-Files'. The plot of the episode is eerily similar to that of the Terminator: Joe Morton's character is given a second chance, going back in time one day at a time to stop a murderer from killing his wife, trying to clear his own name in the process. Very interesting similarity in themes.

The movie being about the start of a major worldwide war (with a heavy use of technology too), an interesting coincidence can be seen in the first truck chase sequence. Just as John and the Terminator speed under the bridge that the T-1000 crashes into, a height warning on the bridge can be read which says "CAUTION 9-11". The truck smashes right into it.

The police computer which the T-1000 uses to locate John Connor's juvenile delinquent record was a functional mobile data terminal on loan from ElectroCom Automation. The prop was the subject of many crew members' inquiries of "Hey, can you look up my record for any outstanding warrants?" They were disappointed when they found out it was not hooked into any actual police databases, but had been programmed to simply display John's record.

The battle rifles carried by the endoskeletons in the Future War segment were created by fitting a fully-automatic Calico 950 handgun, with a 100-round helical-feed magazine, into a fiberglass shell.

Jim Cameron once quoted "You can do anything to a terminator, but don't break his sunglasses, that really pisses them off."

After the escape from the mental hospital, our heroes hide out at a gas station. The pumps at the station feature the logo of the fictional company Benthic Petroleum--the company that owned and operated the undersea drilling rig in "The Abyss."

During the opening future war scene, some of the human soldiers are armed with M41A pulse rifles from James Cameron's earlier film "Aliens" (1986).