There's the quiet scuffling of paws in the other room, punctuated by a soft growl or boof every so often.

And, eventually, a whoosh of the basin being upturned outside the door.

Beyond that, both Alistair and Gru are behaving themselves -- though Alistair throws a glance to the bedroom door every few minutes, in spite of himself. A few more minutes, he decides, and then he'll poke his head back in there again.