come back to earth

[come back to earth] or [come down to earth] {v. phr.} To return to the real world; stop imagining or dreaming; think and behave as usual.

After Jane met the movie star it was hard for her to come back to earth.

Bill was sitting and daydreaming so his mother told him to come down to earth and to do his homework.

Compare: COME TO ONE'S SENSES, DOWN-TO-EARTH. Contrast: IN THE CLOUDS.