It's a terrifying sound, like a hundred people shrieking over and over, a terrible snapping and thumping and pounding behind it.

The Doctor collapses to his knees not far away, hands buried in his hair, working desperately to keep this energy down, cloak the psychic noise, bring his mind back to the here and now. He cannot lose control--time has been altered and he has to... he has to....

He slumps to the ground, the energy slowly wicking back into his mind, the noise dying down. A low-level buzz persists, though. Staticky. Somehow wrong.