16-year-old and her mother who are still asking why did the building have to collapse? >> who ever thinks a building's going to collapse on you. you just never -- i'm sorry. >> half the building is gone. >> in just 12 seconds around 1:30 a.m. the 136 unit condo collapsed. >> i remember mom yelling run and dragging me out of bed. >> angela, devon and her father edgar had been watching a late night horror movie in the master bedroom, all were laying in the same bed when -- >> it just felt like an earthquake. >> angela, 45 years old, says a split second before the floor began the to give way she heard what she thought was thunder. >> i just screamed run. we made it maybe right out of our bedroom, maybe a couple steps right out of our bedroom and then the floor just started to cave. >> their condo was on the ninth floor.