Você voltaria para onde você estava há uma hora
Um time-turner traz o usuário de volta para onde quer que estivesse uma hora (por turno) antes de usá-lo.
The dark ward dissolved. Harry had the sensation that he was flying very fast, backward. A blur of colors and shapes rushed past him, his ears were pounding, he tried to yell but couldn’t hear his own voice —
And then he felt solid ground beneath his feet, and everything came into focus again —
He was standing next to Hermione in the deserted entrance hall and a stream of golden sunlight was falling across the paved floor from the open front doors. He looked wildly around at Hermione, the chain of the hourglass cutting into his neck.
Harry Potter and the Prisoner of Azkaban - Chapter 21
Um time-turner não é um dispositivo de distorção da realidade. Apenas move o (s) usuário (s) de volta para onde eles estavam antes.
Se eles já estivessem na pensieve por uma hora, eles acabariam na pensieve. Caso contrário, eles terminariam no mundo real.