1.Imagine the closed mouth on someone lying on their side so that it has a vertical aspect.
2 Imagine a stick of celery approaching the above mouth until it is almost touching.
3 Imagine the mouth grabbing or "snatching" the celery and snapping tightly shut so the celery is caught.
Are we any closer to gerrin it Roma ? It's a West Yorkshire thing. (No teeth or it may be harmful)