A groom leaving a bride while standing at the altar is an example of a caprice action.
Snow falling in Los Angeles in the middle of the summer is an example of a caprice.
Origin of caprice
- French from Italian capriccio from caporiccio fright, sudden start (orginally, “head with the hair standing on end (resembling a hedgehog)”, but later influenced by capra goat, because of goats' frisky movements) capo head (from Latin caput kaput- in Indo-European roots) riccio curly (from Latin ēricius hedgehog) (from ēr)
From American Heritage Dictionary of the English Language, 5th Edition