From Inside the Grey House:
And then he did.
Markus lunged at her, wanting to knock her to the ground. Natalia jumped up, trying to leap over him. Thinking to land on his back and drive her heels into his flesh, she forced herself down, sinking all her weight to her feet. She misjudged his intentions and missed him as he dove to the right. Natalia landed hard on her feet and she felt her left foot threatening to slip out from under her. She stumbled forward in an effort not to twist her ankle. It didn’t work. Her right foot caught in a crack in the floor and her already unstable left finally slipped and she fell hard on her rump. Her eyes grew wide as she heard the snap.