By coincidence there is a nightmarish news story from Florida about a sinkhole:
"Fla. Man Feared Dead After Disappearing Into Massive Sinkhole" http://www.slate.com/blogs/the_slatest/2013/03/01/florida_sinkhole_brandon_man_disappears_into_sinkhole_from_his_bedroom.html The guy was in bed when the hole opened underneath. - Jed
