He even had the right accent, which was a bit alarming. But again, it wasn't the reaction Zod would have. It could easily be the reaction Zod would have if he was pretending to be someone else just to blend in. It didn't take long to know there were doubles in this city when you were on the internet long enough. When she was through the window, both feet on the ground, Kara looked at the man, then the bottle in his hand, and then back to the man.
Zod would have used a classy glass. But again, it didn't confirm anything. It was just a glass. "I flew." she responded casually as if it was the most obvious thing in the world. "I'll be straight forward. You look exactly like a man who basically murdered my entire race. So I'll ask nicely once." she was steady at first, her voice calm and even, though her fists were clenched at her sides. If it was him, she didn't know if she'd want to attack him, or, if he hadn't gone dark side, be thrilled he was here. "Who are you?" her voice took on a more serious tone. Almost demanding, but not quite. Might as well cut to the chase and then spend time trying to figure out if he was lying or not.
She could always throw him through the wall, but if he was from the point in time where he was on Earth but without powers, that really wouldn't do any good. If he was a clone, he might as well be a human. Physically, anyway.
She wasn't leaving until she was sure that she wasn't facing a threat. That the entire world wasn't facing a threat. So far he was in the clear, but she couldn't just ignore that face. It was younger than what she was use to, but she couldn't shake it. She had to be sure. He'd helped destroy her entire race. It wasn't something she could just let go of.