To overwhelm with astonishment or wonder; to flabbergast
To overwhelm; to cause to fall to the ground.
To cause (someone) to feel unusually alarmed or delighted by something unexpected.
To attack unexpectedly.
To take unawares.
To do something to (a person) that they are not expecting, as a surprise.
To undergo or witness something unexpected.
To cause surprise.
The feeling that something unexpected has happened.
Something unexpected.