You’ve got to wonder why James Cameron was so enthused about risking his life to get down to the deepest spot in the ocean. I mean, it wasn’t cheap; it wasn’t easy, and it must have been pretty bloody dark down there. But this explains it.

What do you reckon is behind the mysterious door? The door to the Architect? How about a door to a hidden underground alien layer, where ET’s been hold up for generations? Click the image below for the full sized thing. [xkcd]