Its looking like a sinkhole took that condo down in Florida.
Cassie Straton was speaking to her husband, Michael, from their balcony on the south side of the Champlain Towers when she noticed the building started shaking in the early hours of Thursday, her older sister Ashely Dean said.
"Suddenly she says, 'honey, the pool is caving in. The pool is sinking to the ground,'" Dean said, according to Sky News.
"He said, 'what are you talking about?' And she says, 'the ground is shaking, everything's shaking' and then she screamed a blood-curdling scream and the line went dead," Dean added.
https://news.yahoo.com/woman-standing-her-balcony-phone-154010320.html