His face was transformed, revealed, as though a mask had slipped.

The mask slipped and he stared at me with ancient eyes.

In his place was a man whose mask had slipped.

High Ridge's voice was hot as his mask slipped for the first time.

Then the mask slipped from his grasp and fell to the floor.

But then the cold, hard mask slipped back over his face.

The mask slipped away and she saw that he was relieved.

The masks slip, and what we see is the simple humanity of two good friends.

He looked at me, and for one glorious moment it seemed as though the mask slipped from his face.

He opened his eyes and the mask slipped back into place.