Tom started to protest, then snapped his mouth shut.

He snapped his mouth shut around another bite of food, beaten to the punch.

The chief snapped his mouth shut on a desire to snarl at the kid.

Claudia started to deny it, then snapped her mouth shut.

She snapped her mouth shut, counted three, and tried not to seem furious.

He started to ask the guard about it, but then snapped his mouth shut.

Alexander snapped his mouth shut, but now he looked confused.

Did you see her snapping her mouth as she ran?

He snapped his mouth shut, with a glance to Richard.

I snapped my mouth shut and thought about it.