He has his head in the clouds.

He walks with his hands in his pockets and his head in the clouds.

He had his head in the clouds in class.

He always walks around with his hands in his pockets and his head in the clouds.

First things first, let's go to the girl with her head in the clouds.

I had my head in the clouds.

Gordon has had his head in the clouds all week.

If you didn't have your head in the clouds, you could succeed.