I stood and grinned at him until he must have thought I'd lost my mind.
We had been grinning at each other only a few minutes before.
She was grinning at me when I turned to face her.
He opened his eyes again and tried to grin at me.
Both the man and the woman thought he was grinning at them.
Almost against his will, he found himself grinning back at her.
He grinned at them and put his head down again.
He looked up into my eyes but I grinned at him.
She sat back down, finally had to grin at me.
She grinned at him again, and he moved on into the dark.