@irontoenail - I'm really glad it's not around most of the world. I heard about a family in Canada recently that had a house on a hillside which was built on some quick clay.
There was a landslide and the house was lost so quickly they didn't have time to escape. Poor people.
And liquefaction is bad enough in an earthquake with normal soils. I know in Christchurch, after their earthquake, the amount of liquefied soil was horrendous. It damaged water mains and roads and just made a lot of places unlivable.
If it had been quick clay, even more lives may have been lost.
So, yeah, thank god it isn't more common.