Frank J. Wilstach, comp. A Dictionary of Similes. 1916.
Unexpected
Fortune came like Agag, unexpected.
—Anonymous
Unexpected as chastity at the bar of a tavern.
—Anonymous
Unexpected, like a thunderbolt.
—Anonymous
As unexpected as a serpent comes.
—Robert Browning
Unexpected as seeing a vision.
—Joseph Conrad
Unexpected as a fifth ace in a poker deck.
—Alfred Henry Lewis