Harry Potter and the Goblet of Fire
"I asked you whether you wanted me to do that again," said Voldemort. "Answer me! Imperio!"
And Harry felt, for the third time in his life, the sensation that his mind had been wiped of all thought ... Ah, it was bliss, not to think, it was as though he were floating, dreaming ... just answer me ... say no ... just answer no ...
I will not, said a stronger voice, in the back of his head, I won't answer. (34.14-6)