This happened today when I took Fraser in to the vets because I thought he had ticks on his belly (and tried to get one unsuccessfully with a tick puller). Turns out I was trying to extract one of his nipples, poor thing. Quite embarrassing and Fraser was being so tolerant. Anyway, while we were waiting in the examining room, Fraser was sitting watching the door expectantly, all aquiver with the sounds he could hear outside. Then I saw him wiggle his little bum backwards until he was sitting on his foot. Several times he got up when he thought someone was coming in, sat down after a while and then did the little backward bum walk until he was on my foot again. It was unspeakably cute. Funny little fellow.