Hi Jonathan
Here is a better example. http://codepen.io/sirhclluk/pen/efc1f8d6779e1bb06365c6e43796075c
So when his right arm bends is the big difference.
This is the first line with rotationX,
.to(Bald_bicept_RT, .5, {rotation:45, rotationX:45, transformOrigin:"60% 5%", ease:Sine.easeOut}, "armR+=1.2")