What almost was the biggest 3D domino pyramid ever

This would have been the biggest 3D domino pyramid ever built (at least on YouTube).

According to Annodomino2007, it had 13,482 pieces in total, and it toppled all by itself when it was more than 96% completed, with just 439 domino pieces left.
Somebody’s gonna have to go back in time to kidnap one of the Egyptians who designed the pyramids to get this one done.