In the streets, office furniture and broken glass bobbed in water that sloshed between buildings. Residents watched the debris float by from upstairs balconies.
All of the laws of physics and bouyancy have been rescinded. Broken glass now floats! http://news.yahoo.com/s/ap/20051022/ap_on_re_la_am_ca/hurricane_wilma
If big enough and flat enough, broken glass will float. So will iron if in the right shape. Broken windows will float easily if lying flat on the water.