What's the correct expression? I'm not a native speaker. I want to describe that he made a expression of shock; like pulled a face in shock; but I feel that's wrong. How can I see it concisely?
like pulled a face in shock; but I feel that's wrong.
It is. It does not say what sort of face he pulled, and that is needed because we need to know what has caused the shock - revulsion? Horror? Surprise? Delight?
Assume that his friend has just been shot dead: "His face registered the shock." "His face contorted with shock."
"Pulled a face" is informal and is likely only to be used with minor causes.