Character mistake: When the T-1000 comes from the checkerboard floor and turns into the security guard at the mental hospital, the guard has just gotten a cup of coffee. On the side of the cup he has Jack, Jack, Ace, Ace. He looks at the bottom and says he's got a full house, but the card value on bottom of cup is Queen, which leaves him with only two pair.
Character mistake: Sarah Connor breaks Dr. Silberman's arm while informing him, "There are 215 bones in the human body. That's one." There are 206 bones in the human body.
Character mistake: In the alternate ending on the DVD edition Sarah says that Michael Jackson turned 40 on the supposed day of the war. Michael Jackson's birthday is August 29 1958, so he would have been 39.