Andrei might have welcomed the attack. An attack was something he could respond to, something that he didn't have to think about. His body was a tool that never betrayed him, unlike his brain.
Andrei bucked up, his hips rising from the ground. As soon as he had found some sort of purchase, he could raise himself up. Instead of trying to get Leon off, Andrei tried to find momentum, tried to find the toppling point. And... There they went!
Leon landed on his back, Andrei right on top of him. Using the distraction, Andrei turned around, pinning Leon's arms and legs to the ground with his own. With his fangs bared, he growled.