Bruce lapses into silence. It's always been his default state. Silence unnerves people, it's a weapon as potent as any fist or finishing strike, and Bruce excels at its usage.

But it's not the only weapon he can use. Nor the only one he knows. His year out of time allowed him to hone his skills, practice against opponents unknown to him. Martial arts was hardly as refined then, but he did pick up a few tricks. One of those tricks he uses now, reaching out to drive a sharp blow against her solar plexus. The move has no name, nor is it in any form of martial arts known on Earth. Were he fighting for real, the move would temporarily paralyze her. As it stands, it will simply serve to make her feel briefly weak.