The situation in Ålesund is very extreme, and definitely shows that advice from experts should be taken into account when building.
It's not so much that the about 7500 tons of mountain crashed into the apartment-building, but rather that it slid into the ground/first floor, and the first floor was moved forward - on top of a propane gas tank, which subsequently lit on fire. 5 people are missing, presumed dead, and they can't be searched for in the building because of the danger of explosion. People living in a radius of 500 meters have been evacuated from their homes. There was a 6th person presumed missing - a soldier home on leave - but he returned back to the military service just the night before. Both his parents are among the people missing/dead.