This gives more details, plus a very cute video. I mean, really, these guys were cutting out the toe of the slope! This thing is still moving, and it's a guess how long it can move before going for a ride! I'm quite amazed it has stayed up. A good earthquake and WHOOSH!
They'll try to put back the toe they chopped out, and then start carving it out from the top. That's a heck of a lot of rock!