The phrase "saw coming" is often used to describe a situation where someone was able to predict an outcome or occurrence before it actually happened. While there is no direct antonym for this phrase, some alternative expressions that convey the opposite meaning could include "caught off guard," "unexpected," "surprised," or "blindsided." These phrases imply a lack of foresight or preparation for an event, unlike "saw coming," which suggests a sense of foresight and preparation. Overall, using antonyms for "saw coming" can help to emphasize the unexpected or unplanned nature of a situation.