Sounds like someone is very uncomfortable, and someone else is very angry. Tense!

I myself like to keep descriptions light, and also rely heavily on body language. It says so much more!

Sosososososo true.

There are two main characters – both are described as walking with their shoulders hunched, but one has his head bowed, eyes lowered and arms tucked in – the other has her head down but eyes up and alter, arms turned slightly out and weight intentionally spread. His hands fold in front of him, hers are clenching and unclenching at her sides. Both are reacting to another person in the scene, one the man knows well and the woman has only recently met.

I bet you can come up with some fairly accurate theories as to what’s going on in the scene from their stances alone, though.

Aye. And actors that can really become their characters on screen… love ’em.
You might like something my brother likes to say about actors.
“You pay a great actor for when they aren’t speaking.”
What makes a good actor into a great one is how much they can communicate without words.

It’s scary (or comforting?) how much of that is true – about attitude, I mean. You can’t be trying too hard, or it’s obvious. Or it’s like when you see still shots of a character in a movie, and you don’t recognize it as X actor until you see a video clip.