Astonishment.
Unpreparedness, unwillingness, or inability to believe that something is the case.
The loss or abandonment of a belief; cessation of belief.
Something unexpected.
The feeling that something unexpected has happened.
To attack unexpectedly.
To take unawares.
To do something to (a person) that they are not expecting, as a surprise.
To cause (someone) to feel unusually alarmed or delighted by something unexpected.
To undergo or witness something unexpected.
To cause surprise.