Yes I did die. The first one (the largest hole, as I tried to fill them back in, and it crashed me a second time, so I left them alone) dropped me to about 5% life left. The second one straight up killed me.

On the first hole, I was trying to level terrain, so I could build a road over it, and that's what dropped me down. The second time I was trying to raise terrain.

His video didn't show it too clearly, but at this paticular zone line intersection, it caused a verticle running cleft, so maybe that was the source of the problem to begin with: A buggy zone line. Here is the screen shot I took: