Waldo
The roof of the plane is walkable, slightly slippery, but walkable, and you soon find yourself near the front. The scene is the nose of the plane flattened against a cliff wall, and you can guess from what snippets of the land you've seen through the fog that this is some sort of canyon.

It seems that the plane took a tree with it, because you can see that the thick swamp tree branches punched through the cockpit window. That is probably why the door was jammed.