what an idea!
What a fantastic idea!
Quelle idée de sortir par une nuit pareille !
What a crazy idea to go out on a night like this!
— Souvenirs de Marnie (2014)
What idea?
What a splendid idea!
What an absurd idea!
Quelle idée de venir à Miryang parce que son défunt mari y est né.
What a strange idea, coming to Miryang just because her late husband was born there.
— Secret Sunshine (2007)