From the other Carlisle's irritation rises further uncertainty. She's responding as though she heard him and understood what it was he demanded of her, but he cannot feel her will bucking back against his, as one might when trying to dominate the mind of another. He tried twice, and to no avail. From that, he draws two conclusions:

1. He cannot control her for whatever reason
2. He's in trouble

He can tell the second conclusion is absolutely true as she swings at him; luckily, he sees it coming and steps back quickly enough to dodge, but he nearly falls over his own legs in the process, much like the real Carlisle would. Like original, like double.

The double growls, not willing to accept that thought. He's not a failure like his counterpart. If this tool is no good, he'll find another -- already, his mind reaches out subconsciously, looking for someone nearby who will either do as they're told, or help protect him from Rey, as he's not sure she'll let him go now that she has an inkling of what he's trying to do, what he's out to destroy.

Or he'll take a tool and an unwitting protector, if there's one out there. He's not picky.