Right in the middle of a flutter, her stomach dropped.

Then later, when I was by myself in the examining room, you know, your stomach drops a few times.

His stomach dropped as he thought of the girl on the beach.

My stomach dropped once more, and the feeling of sickness returned.

My stomach dropped to the ground, which was a couple hundred feet down.

I noticed all of this while my stomach was dropping.

He looked around to see what Finn was doing, and his stomach dropped.

Her stomach dropped the equivalent of half a dozen stories.

My stomach was dropping like an elevator in free fall.

Simon's stomach dropped when he saw who'd come in with them.