Wasnt this from an episode of the Simpsons?
I seem to remember something about Homer hanging on the face.
It looks a bit like the Face of Boe.
I followed the links to see if they had videos of this whole process as well and fell across their webcam instead:
It hasnt moved much since I've been watching... I think it might be on a loop.
From "Boom!" to Beautiful - Crazy Horse sculpture...
Wow... good ole blastin' stuff, artisanship, and horse sense