['neutral']
I half thought he was going to rise from his chair, but he remained seated, although a remarkably well acted expression of astonishment rose on his face. 
חשבתי שהוא עומד לקום מכיסאו, אבל הוא נשאר לשבת, למרות שהבעה של תדהמה משוחקת היטב עלתה על פניו. 
I did not like him and did not believe his reaction.
לא אהבתי אותו ולא האמנתי לתגובתו.