He doesn't notice the weapon appearing in her hand-- or, if he does notice it, he doesn't pay any attention to it at first. Not until it's blasted at him, anyway, because once it hits it catches his attention pretty easily.

He recoils, flinching back from it with a grumble of pain, one giant hand grabbing his shoulder where the hit landed. He's not used to being vulnerable, used to shrugging off bullets and dispatching the shooters to get the annoyance to stop instead of to protect himself. So he smacks the ground and charges, intent on either running her down or running straight past her.