The game goes like this:
One person is the photographer.
The other person is their model.
The photographer gives the model a lot of vague and wacky endowments.”OK, now show me you as a superhero. Love it! More superheroey. More like Batman. OK OK, not so much Batman as … The Hulk! Be a sexy Hulk. Perfect! Beautiful! But now you’re the Hulk in a field of daisies. Be a big sexy superhero monster in a field of flowers!”
The whole time, the model is trying to wordlessly capture what the photographer wants. It’s high energy and fast. And sometimes the model will strike a new pose on his own, and the photographer will then need to verbally justify what the model is posing as. It’s back and forth, neither leading nor following.