Workers going about their job making mountains, hillsides, slopes, valley walls. etc, safe.

Impressive rock fall. In the climbing world, rock fall is a constant concern, and you don't attempt to dislodge a rock unless you fully analyze all the surroundings and anticipate the consequences (how much rock, make sure it's clear below, that your ropes and anchors will not be impacted etc). It appears from the video they knew what they were getting into and planned accordingly.?