Wouldn't he have said "tetrahedral" instead of "pyramidal", seeing as the shape he described is the tetrahedron, rather than the square-based, five-verticed, five-sided pyramid? Seriously, that one detail absolutely ruined the entire story for me. Downvote.
OMG I am so kidding, I love Xyank and 2700 and all the crazy, end-of-the-world physics that is barely kept from obliterating reality through sheer luck and the skin of their teeth.
Anyway, I was just trying to be helpful.