Surprised means reacting to something you never expected. Look surprised, pleasantly surprised, I was surprised.
It is a brief emotion — surprise lasts a second or two and then turns into something else, which is why it is the shortest-lived of the recognised expressions. Pleasantly surprised is the fixed phrase for a low expectation exceeded. I would not be surprised is the standard formula for predicting something without committing to it. Note surprising; and surprise as noun and verb.
1adjectivesurprisedReacting to something you never expected.
“I was surprised to see him at the party, because he'd said he was ill.”
surprised is a state of astonishment.
Also accepted in games: shocked, amazed
Practised in Feelings & Character