Colin's humor faded as he saw how much dark anger there was in his old friend's expression.

The humor slowly faded from his eyes, leaving them cold and hard.

Jack's humor quickly faded, and his throat went dry at the sight of her.

Joe gave his wife a half-reproachful look and the humor faded to an uncomfortable silence.

The humor faded from her eyes, but not the determination.

However, her humor faded after we sat down in her little office.

She saw the good humor fade from his face and was sorry.

Her humour faded when she reached the bungalow's front porch.

The humour faded from his face and he leaned back in the chair, watching her.

He lowered the target, and the humor in his expression faded just a bit.