unexpecteddeed
nounUK /ˌʌnɪkˈspɛktɪd diːd/
US /ˌʌnɪkˈspɛktɪd did/
A thing someone does that you did not think would happen.
Finding a lost puppy at the door was an unexpecteddeed that made everyone smile.
OTHER MEANINGS
2. A helpful action that nobody saw coming.
Her unexpecteddeed of sharing lunch made the new kid feel welcome.
3. A strange or surprising thing done by someone.
The unexpecteddeed of the cat knocking over the vase shocked us all.
4. Something done without any planning.
His unexpecteddeed of singing in class made the teacher laugh.