Sentences with Curveball

In the middle of the intense chess match, his opponent made a curveball move that completely caught him off guard.

During the science experiment, the students were surprised by a curveball when the chemical reaction produced unexpected results.

The last-minute change in the travel itinerary proved to be a curveball for the vacationing family, causing some frustration.

The unexpected traffic jam on the way to the airport threw a curveball into the meticulously planned vacation itinerary.