The 5th pyramid was for all the ketamine the workers used after the day shift ended.

Pyramids 1-4 were electric generators that synchronized with the earths shumann resonance. But pyramid 4 failed in 1986 and they had to evacuate 50 square kilometers as an exclusion zone. Those who never left have been found today with higher vibrations and spiritual awareness levels. Within days they hired people to come sift the sands for quartz fallout and all 6 pyramids were capped with basalt sarcophaguses to prevent further fall out.