Caught in this video is just his fourth or fifth attempt at it. And as you can see, considering how new this was to him, he was doing quite well. Very well, in fact. Unfortunately, he didn't see it that way.
Anyway, turn up the volume and listen to him grunting these little whining noises as he goes. What a hoot. What a character.
There are those days when I enjoy being a Pop Pop more than I ever did being a pop.