[Vulpes is aware that this is his last chance to succeed here, and that if he fails, it'll likely mean a particularly severe beating. He therefore is determined to keep that grip no matter what. The impact of the back of his head with the floor is certainly unpleasant, but his hood dulls the impact slightly and in the end it isn't enough to make him let go. In fact, he tugs harder in response. If he could make Miguel pass out, even for a brief period...]