A premonition; a feeling that something, often of undesirable nature, is going to happen.
The feeling that something unexpected has happened.
Something unexpected.
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.