After the initial fright has worn off, he looks to his heart's content - as much as he can look, at this speed. He's never seen Lust from quite this height or speed before, and it's a novel experience.

"Oh! Okay." Thankfully for Gabriel, Vivi's curiosity is overridden by the fact that Gabriel seems to know what he's doing and he should listen. He dutifully closes his eyes, though he does open his other senses regardless - he wants to know if he'll feel the same thing Gabriel does as they both shift through, or if it'll be different for him since he isn't an angel.