My son threw something at the cat, and I told him "no". He got a little sad, so I picked him up. Then we sat for a moment, and he hugged me, then patted me on the back. It was the single most comforting...and saddening...thing I've ever experienced.
EDIT: I just put on some Behexen, and as soon as it started he started banging his head, and when the growls started, he growled back. Awesome.