Kat caught him the second before he went to knock, and he could help the bit of shock and awkwardness he felt. Her friendliness, though, put him at ease. She even knew who he was. Yeah, she was from the future, but he hadn't expected that. The place was impressive for a temporary base, and her humor was refreshing. To be honest, she reminded him a little of Rose. He raised his hands in surrender, though his voice and face were playful. "Yes ma'am. Hands off."