Russell misses part of the conversation up to this point. He spent a few seconds squinting at the, admittedly, impressively sized mouse tail... And mostly, he's been busy kicking himself for not insisting on staying to watch out for Benjiro, especially in light of his having magic so perfectly suited to the task. But he tunes in back in time to catch the notion - the earthquake happened when the giant mouse barely twitched.

"...Ah. Well. That might not go over swimmingly," Russell concludes, mind running through notions of what might happen if a shark does go hassling the mouse. "We... need that shrink ray for more than sharks, don't we."