She can't hide any more than she already is; all Elsa can do is hope beyond hope that Anna doesn't look her way. Her stomach rolls, and she can't even identify why. It's like watching a train wreck, though nothing bad is happening at all; no one's getting hurt, except maybe Elsa. That's what this little flutter in her stomach is, isn't it? Anna's talking, and this girl she's with, she's smiling. Whatever they're discussing makes them both laugh, and Elsa suddenly wishes she were anywhere else but here.