Hunter Meat Packing Plant "American Beauty" Moment

Do you remember that scene from American Beauty where the weirdo dating Kevin Spacey's daughter shows her a tape of a plastic bag blowing around in the wind? I thought of that when I saw this piece of paper dangling between the staircases in the offices of the old Hunter Meatpacking plant. How, after the building has been repeatedly hit with various demolition equipment, did this piece of paper come to be dangling so peacefully in the wind?