modified
unforeseen, surprising, unlooked for, accidental, fortuitous, sudden, startling, unheralded, unpredicted, coming unaware, astonishing, staggering, stunning, electrifying, amazing, not in the cards, not on the books, past conjecture, unanticipated, not bargained for, uncontemplated, wonderful, prodigious, coming without previous intimation, unprepared for, instantaneous, eye-opening, like a bolt from the blue*.
Antonyms expected*, predicted, foreseen.
