The ground rumbled suddenly and the garage walls shook.

Lightening flashed in the east and thunder rumbled a posthumous threat.

Katie said, rising.  The ground still rumbled, the trees surrounding both food cubes expanding fast and tearing up the ground in several directions as they did.  She looked around, irritated to find she'd caused a chasm to form between them and the direction they'd been running.

The ground rumbled more violently as the sun rose, until it began to split open.

Fountains shot up from the newly formed lake nearby, and the ground rumbled again.