I have been several times on mountains tops. But rarely at that high (~3800). You hear so many times people telling that here is a completely different world. You don't really get what it really means until you visit it.
First it's really huge. Unfortunately, you don't see people on this picture. But if you look in full size, you will see footsteps on the crest on the left part of the picture.
The altitude create really hard weather conditions. When snow or ice melt, water runs between stones, when it goes bellow zero, it becomes ice again with wider volume and strikes rocks. They explode little by little. This is why they have this unfriendly jagged aspect: "Mordor" as geek call it :)