Billie raises an eyebrow at that amused snort, but then she shrugs and leans her weight back on her heels, idly crossing her arms as she does. She's settling in to stand here awhile.

"It was kind of like a hum, coming from the entire river. You could hear it everywhere." Though just recalling it has her frowning. All recent memories she'd rather forget. "I'm not sure why it isn't doing the same this far down."