Physical features should do more than simply describe how a character looks. Just like their occupation or area of giftedness, a character's appearance can say a great deal about them. Hinting at traits through clothing choices, alluding to an emotional state through movements, and highlighting certain details for comparison or contrast purposes can help readers form opinions on who the character really is.
COMMON ACTIONS AND ALTERNATIVE WORDS TO DENOTE THEM:
EMOTIONS AND RELATED GESTURES:
During times of terror, the legs can respond to the fight-or-flight scenario in a number of ways. They might suddenly weaken or seize up, causing the person to collapse. Alternatively, they may twitch or jerk as the subject prepares to bolt.
In times of excitement, the legs often exhibit quick, almost involuntary motions. They might quiver or tremble as adrenaline rushes through them. The subject might find herself bouncing, jumping, or twitching in response.