Family of Four Dies in Sinkhole 11.28K Max Read 05/13/10 01:16AM Filed to: Tragedy Tragedy Disasters Sinkholes Montreal Canada Michel bouchard Appic A Montreal family was killed when the "sensitive clay" on which their home was built spontaneously liquified and gave way. "Even a fly landing on the surface can set it off," geologist Michel Bouchard said. [NYT; pic via AP]