CNN Anderson Cooper 360 March 5, 2013 06:33:00
Every single year. the state keeps a loose track of them. people call in to report them when they happen. we were talking about how deceptive these things are when you look at their size. there is much more to this cavern below the water level than up here where i am standing. look up top. the hole that opened up when the sink hole was formed you see the size of that and you see how large this whole cavern is underneath it. so when you see a sink hole opened up on the surface there is so much more going on down below. >> you get a sense how a person can disappear. how doctors say they have c...