out of thin air

US /aʊt əv θɪn ɛr/
UK /aʊt əv θɪn ɛr/
"out of thin air" picture
1.

de la nada, inesperadamente

appearing or happening suddenly and unexpectedly, as if from nowhere

:
The magician made a rabbit appear out of thin air.
El mago hizo aparecer un conejo de la nada.
Ideas don't just come out of thin air; they require effort and thought.
Las ideas no surgen de la nada; requieren esfuerzo y reflexión.