It is possible the viewing angle changed in the 3rd square.
I don't think it is possible to make intelligent, non-pendantic comments on something as simple as a comic strip. I think people comment for the sake of public commenting (nano-Warhol). I add pure pendantic comments to dilute the stream.
Another pedantic comment, the second box shows the two chaps are looking to sit down on the boulders with a rather large mountain in the background, but yet in the final box, the mountain is gone! COMPLETELY