The Turtle and the Cheetah

Just as it was about to react, the Turtle felt a splitting pain in its exposed back, as if its back had been split open by a massive hammer.

"Grooohh!!!" The Turtle yelled in pain as it felt its chest collapse and its blood spurt out of its back like a fountain. It knew now what was happening. 

That insect had somehow found its way back onto its back and had attacked its back while it had its guard lowered. It needed to act quickly! [Crystallisation]! 

Immediately it felt that same feeling of having crystals grow on its skin come back, but not before another blow came to its back, making it land on the floor with its chest as blood forcefully made its way out of its mouth and nose.