out of nowhere
Des feux d'artifice sont apparus de nulle part.
Fireworks appeared out of nowhere.
— Full River Red (2023)
Mais les mots des livres ne venaient de nulle part.
But the words in the books came from nowhere.
Tom a surgi de nulle part.
Tom appeared out of nowhere.
Comment pourrais-je arrêter quelqu'un qui sort de nulle part ?
How could I stop someone who comes out of nowhere?
— The Chaser (2008)
It came out of nowhere.
Tom est apparu de nulle part.
Tom appeared out of nowhere.
The voice came from nowhere.