I think this is cool pose. I can do this a little bit but have to work more on my lats. If you look closely, it's not all pecs but really is more the lats that he is flexing first and then with the support of the lats he can push up the pecs and flex the shoulders. Yesterday I ran across a video of a bodybuilder demonstrating how to work the lats better. I tried it during my workout later that day. Wow! For the first time I could feel a pump in my lats. I not only was excited that I could feel this but it also affected my posture in powerful and lasting way. Be sure to search for and practice proper form and exercise techniques.
I learned my new lats techniques from Ryan Humiston on YouTube. He's got great techniques for all muscle groups.