unexpectedly

Only on rare occasions did their good behavior falter: for example, when peas were unexpectedly served at luncheon.

It was like seeing the face of a long-lost loved one appear unexpectedly in a crowd, shocking and yet so very familiar, as if the person in question had never been lost at all.

Improbably, unexpectedly found by Lord Fredrick Ashton, and taken in as his wards.

A widely used medication for diabetes prevention may unexpectedly interfere with one of the most reliable ways to lower disease risk: regular physical activity.

After an hour of gentle simmering, I finished with a splash of apple cider vinegar, a stream of heavy cream and a dusting of parmesan, the final sauce glossy, fragrant, rich and unexpectedly bright.