How should you act surprised?

Answer 1

Let's say you walk in a room for a suprise party, and you know about it. So when u walk in open your mouth so it looks like you are going to laugh, laugh a little bit then say something natural like, whoa! If it something sad like someone's death, put on a sad face, shrug your shoulders a little bit, and look off into nowhere while bitting your face. Hope that helps!