Melting

I have written about this in the past, but if you observe the first one to two seconds of the collapse of the North tower, basically the whole upper ten stories of the building seems to melt down without any discernable distortion of the outer frame.

It is extremely odd:


There is no clear floor failure, the whole top just COMPACTS down without any crumpling. It is not unlike the way the 2nd plane melts into the south tower.

While the official NIST story doesn't explain this phenomenon, I don't even know how explosives can explain it.

Pause the video at the one second mark, an dnote the building has gone down at least three floors in height. Wouldn't you expect to see some serious distortion in the northwest (the shiny line on the right-hand) corner?