Savage stops for a smoke
I haven't seen it mentioned here, but one of the nice touches in the movie was when Savage/Peck is about to take over the airbase. He has his driver stop the car outside the gate and they both light up a smoke. The General looks around, seems to stiffen his backbone, throws down his cigarette and gets back in the car.
To me, it indicates he was about to adopt his tough-love character and begin a hellish task. He had to leave his real self at the gate and start kicking butt. Not a necessary scene at all, but very well done.