His face slipped out of sight below the level of vision.

The Mole's face slipped back into view, easing from the shadows.

Pam's face was slipping in and out of focus.

Her face fell into a thoughtful expression, then slipped in to one of pain.

Jack entered his office and closed the door before he let his face slip out of neutral.

But almost instantly his face slipped back into its usual stern lines.

But, every once in a while her face slipped and she told the truth, because she couldn't think up the lies fast enough.

Now that he had the name, the face slipped into place.

Suddenly the face slipped into the frame in his mind.

Her face, gone stern from its previous smile, slipped into an expression of sheer dread.