"Turned around" means rotated or pivoted to face the opposite direction, or reversed course. It also describes improving a situation or outcome after problems. In stories, it can mark a quick reaction, like when someone suddenly responds or leaves.
When I started counting my blessings, my whole life turned around. Willie Nelson
Just when you think you know something, it gets turned around and challenged in some way. But those changes are welcome because you end up learning more. Jennifer Beals
You never turned around to see the frowns, on the jugglers and the clowns when they all did, tricks for you. Bob Dylan
I got behind that pencil and nothing happened for many years, but since they put me in the Songwriters Hall of Fame, I've turned around. I took a good look at myself and said, I think it's time to get back at work. Otis Blackwell
As long as you have the courage to admit mistakes, things can be turned around. Haruki Murakami
I turned around and saw the crease on the bed where Camilla had been seated, the sensuous contour where her thighs and hips had sunk beneath the softness of the blue chenille bedspread. then I forgot Sammy, and wild with longing I threw myself upon my knees before the spot and kissed it reverently. John Fante