Arkan, for crying out loud. The twin towers exploded into dust. Many, many chunks of building, from huge to small, were propelled sideways, and fell down. These chunks had dust trails. Huge dust trails. Opaque dust trails. Thick, dense dust trails. The dust then fell, almost as rapidly as the aforementioned chunks of building.
If there is a chunk of building falling, and it is giving off a huge trail of dense dust which falls rapidly, it is a fizzy. If you have a questionable chunk, post a video, and I will examine it.
Goodness gracious you folks are great at missing the point.
The point is: Steel turned to dust. Below is not a fizzie. Below is something even more astonishing.
http://i18.photobucket.com/albums/b108/janedoe444/ARG/dustspire.gif
If you think the fizzies can be explained by something innocent, like drafting drywall, then let's have an experiment. If it is drafting drywall, we should be able to recreate a small fizzy.