1.   Before he had reached halfway the floor in front of him fell him.

2.   But watch out below when the floor falls in.

3.   Her husband, however, died when three floors of cement fell on him.

4.   One hundred minutes later, the building collapsed, upper floor falling upon lower floor like a giant accordion quickly losing steam.

5.   So many people packed into the tiny old church that its floor partly fell through.

6.   The floor had fallen in, and old car parts littered a weed-infested yard.

7.   The firefighters were on the main floor of the one-story warehouse when the floor fell into the basement.