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.






Answer: In addition, another deleted scene shows that the T-1000 was damaged by being frozen and thawed and was having difficulty maintaining form. He wanted to be sure he wouldn't mess it up.
LorgSkyegon
What's especially odd about the scene is that both examples we gave to help answer this question were actually deleted from the original release. When I first saw this movie in the theater when it was released I had the exact same question, it wasn't until I saw the Special Edition with the deleted scenes reinserted that it made sense.
BaconIsMyBFF