unexpectedaction
nounUK /ˌʌnɪkˈspɛktɪd ˈækʃən/
US /ˌʌnɪkˈspɛktɪd ˈækʃən/
Something you do that no one thought would happen.
The dog's unexpected action of jumping into the pool made everyone laugh.
OTHER MEANINGS
2. A step taken without planning ahead.
Her unexpected action of quitting the game confused the team.
3. A move that catches people off guard.
The cat's unexpected action of hiding in the box startled us.
4. Something done that nobody predicted.
His unexpected action of sharing his lunch made the new kid smile.