Brian wants to come out of his cage

When Brian's in his cage, he's usually on his boing, trying to make it swing more.  Whenever we approach him, he leaps to the front of the cage, hoping to come out.  Unfortunately, I was on my way to work, so he just got some verbal attention and foot rubs.

If you listen closely at the very end, he starts to whistle, but I turned the camera off too soon to hear much of it.