1. Smirking
2. Running his hands through his hair
3. Looking amused for any reason whatsoever
4. Tensing up
5. When the other character can FEEL them tense up behind them
6. The jaw thing™
7. Sleeves rolled up to elbows (or the action of the rolling)
8. Consequently, FOREARMS
9. Loosening his tie
10. Taking his tie off
11. Raising an eyebrow
12. Driving with one hand
13. Licking his upper lip