20 Things You Didn't Know About The Terminator
Contrary to the character of the Terminator, Arnold Schwarzenegger is actually a pretty approachable guy. Because of this, Schwarzenegger wanted to avoid his co-stars Linda Hamilton and Michael Biehn as much as possible in order to ramp up the fear factor when they actually got to see him.
And it worked. When Hamilton first lays her eyes on Schwarzenegger in the Tech Noir nightclub, you really believe in her fear as he points his pistol towards her.
This seems to have also been enhanced by the shooting schedule, as Schwarzenegger was the last main cast member to join the shoot, with his first scene being him in the hijacked police car looking for Sarah Connor.