21 May 2008
Video of a "sand geyser"
An interesting clip that has been posted numerous times around the web. Similar phenomena have been documented adjacent to pile drivers releasing subterranean steam, in association with earthquakes, and offered as explanations for geologic features on Mars. Those interested in pursuing the topic should Google the more common term "sand blow."
The one in this video is particularly dramatic. The sightseers clustered nearby are a bit foolhardy, as a variety of toxic oilfield gases might be emerging with the sand.