Incredibly, his jaws cracked and wavered in another large yawn.

Nothing had to stretch his mouth open until he thought his jaws would crack.

Her jaws cracked together like a window slamming as she fell backward.

Yellow Cap's jaw cracked and his head struck the frozen ground with a thud.

The man's jaw cracked, he slid down in the seat of the car, unconscious.

By day, however, they are more likely to move in on someone else's kill and carry off parts that other jaws cannot crack (below).

Several teeth were shattered, and the upper jaw cracked.

She yawned till her jaw cracked, then sniffed the air.

The jaws crack together and they tear each other apart.

Her own jaw cracked in mimicry before she could stop it.