It seem's awkward to me that the arms are bent so much on the initial lift up/rotation. I feel like they would lock, or come close to locking.
I know what you mean and there are problems throughout the entire animation where I had to make poses that I didn't want to accommodation for this dumb rig. His proportions are all wrong and so getting realistic poses were impossible. Half of the annoyance was that I had a video reference of myself acting the scene out and I couldn't match my own movements because the rig can't do certain things.
