... When the Milky Way is lying down flat, rimming the horizon, the area overhead is completely dark. This is the portal into which Pakal falls on his sarcophagus lid and out of which beings of the Otherworld emerge.

The Maya called this dark place the White-Bone-Snake, but it was also called the Ek'-Way, 'The Black-Transformer' or 'Black-Dreamplace' ...

The ghostly 'pipe' (in Pb9-33) in which the sun disc appears to be 'recycled' has him in the lower part, presumably a sign that he is not rising but descending.