"Lines of methodology," is her oh so helpful explanation as she makes her way in, step by careful step. River's unusually focused attention stays on the guns during most of her inward progress.

Because that's not, you know. Strange.

When she's a foot away from the table, though, the focus changes and she leans down, takes a breath, and blows a little plume of dust up into the light. (Either she is trying to help solve the Problem of the Dusty Table, or she's trying to demonstrate the severity of said problem. It's hard to tell.)