The Elite Upper Body Move
A lot of elite hitters get their arms in a position that resembles somewhat of a house. As you can see there are five points of contact which makes a pentagon shape. The main point is to help you all understand the certain angles the arms can make.
Take a look at the pictures below of Yelich, Trout, Betts, and Bonds that their "house" is shaped a little bit differently. Just like how the architecture and shapes of the homes many people live in are also different.
Now does this something that happens every single swing? No, but I bet you that every ball these guys hit from this position at contact was crushed. A matter of fact this is something you can practice that will help you generate more bat speed and more hard contact with the ball.