The speaker says that after the victim’s heart was removed and burned, the body was rolled down the pyramid steps.

“to the causeways one after the other they'd be worn up to the the top of the pyramids to the temple complex four priests each would take an arm and a leg while a fifth one would use an obsidian blade to open an incision and pull out the heart which we offer to the gods i've been to those pyramids the ones that you to walk in the the steps leading up are very very narrow you almost have to walk up sideways deliberately so because when the heart had been taken out and burned the body would be tumbled off the far side”

“right and the steps were so steep to allow it to tumble all the way to the bottom and then the warrior who'd taken that prisoner would then take the flesh home to be consumed it was the consummation of his victory as a warrior to take on literally internalize the defeated enemy so this was as you say it's a cycle that the world is better off without i'm not going to make any excuses for it but the motivations of those who did that that was not”