1.   Gao Yang jerked his head around, as his stomach lurched and a pocket of air rushed noisily to his throat.

2.   Her stomach lurched at the thought of leaving Millfield.

3.   His curt tone made her stomach lurch.

4.   My stomach lurched and my heart began to pound.

5.   It can make the stomach lurch, first from the spatial plunge, then the sense of foreboding.