You must be tripping, this is great! The exaggerated pose looks 100 times better, really nice twist of the upper body there. It's the original pose where the angle of the ribcage looks a bit off, as if we were seeing only the back of the box, whilst we are supposed to clearly see the chest of the model (so we should see the front of the box). Don't be afraid to twist and deform those shapes a bit (you did it in wonderfully in the exaggerated pose); these volumes are supposed to be organic and flexible. I would suggest you use the square shoulders Stan sometimes uses in his mannequins, since they convey a better sense of direction that the spheres don't quite match, and that you're actually conveying better when you draw the deltoids. Great job, Dave!

Nice work!

For the bumps of the knee, the most obvious landmark is going to be the shape made by the patella on most people. Once you find that, you know that the landmarks of the condyles make a sort of square around it, and the fat pad below it makes an ice cream cone shape. The head of the fibula makes a bump in the bottom corner of the square. I think you did a good job finding the scapula! Great work.

Good stuff my man. I would have used an cylinder for the torso of the rhino. Would show more of its form