This large sinkhole consumed about half a house in Nixa, MO only a couple miles from where my son lives. News accounts said that there are sinkholes very near my sons home. I can't imagine the shock of having your house fall into a hole that suddenly appears in the ground. The owner of the house heard a sound and climbed into his bathtub thinking it might a tornado. Fortunately the half of the house that went into the 75 foot deep hole was not where he was. More fell later as a spectator happened to be present with a video camera. Scary.
http://undergroundozarks.com/blog/index.php/2006/08/