Dean couldn't help it. He screamed when her foot came down hard on the one that was still throbbing and burning with pain from the spell she'd cast. His good hand scraped and scratched at the floor, seeking and not finding purchase. He shuddered through it and flinched at the sound of glass breaking. Luckily it wasn't near enough to him to cause him damage. Not from that anyway.
He'd pushed too far. he had to keep her from killing him. He couldn't die here. "Someone saw you. I saw you. In someone's memory. Saw your face," he gasped. "Don't know who you are." He could hardly form sentences but he had to calm her back down a little. He tried shifting thinking through blinding pain.
He was still trying to figure out how to take her by surprise. He wasn't restrained. If he could get out past her, he could make a break for it. But he couldn't move just yet.