Yours like doing Tai Kwan Do. Hehe.
I also have 2 monster here recently - one bigger and one smaller. They started playing like that since 2 to 3 weeks ago. Not only do they enjoy that play, but also I enjoy watching them play. But when it is too much, I do try to stop, I am worried the bigger one will hurt the smaller one somehow. They are 4 pounds in difference!