11.   Clancy, of Oakdale, died Sunday when he entered a burning house in Queens to check for survivors and the floor collapsed.

12.   Clancy also died searching for survivors in a burning house, when the floor collapsed.

13.   Fearing that the floors would collapse, they took the stairs down, trying to soothe two panicking flight attendants on the way.

14.   Floors collapsed onto floors below.

15.   In a progressive collapse, floors collapse onto each other.

16.   In a split second, the packed dance floor collapsed and the dancers plummeted three stories, disappearing en masse.

17.   Prime Minister Murayama, on his trip here, viewed a hospital in which the fifth floor had collapsed, forcing the patients to be evacuated.

18.   The floor collapsed, and Bradley slid to the basement.

19.   The roof has leaked so much rain and snow that the top floor has nearly collapsed.

20.   The pennies were sent from the U.S. Mint in Denver in open flatbed trucks to a Long Island warehouse, the floor of which collapsed under the weight.