chunk: They escape the city's guardians, gain access to the temple, and find it filled with artifacts from many ancient civilizations. Indy believes the aliens - in fact, inter-dimensional beings - were "archaeologists" studying the different cultures of Earth, and Mac remarks that every museum in the world would want the temple's collection. The five enter a chamber containing the crystal skeletons of thirteen enthroned skeletal crystal beings, one missing its skull. Spalko arrives and presents the skull to this skeleton. It suddenly flies from her hands to the skeleton and rejoins, whereupon the aliens reanimate and telepathically offer a reward in ancient Mayan through Oxley. A portal to their dimension becomes activated, and Spalko demands knowledge equal to the aliens'. The thirteen beings fuse into one, and in the process of receiving the overwhelming knowledge, Spalko is disintegrated and sucked into the portal. Indy, Marion, Mutt, and Oxley - now released from the skull - escape,