...Right before, as well as sequential explosion sounds during the collapse.
There was a HUGE explosion that can be heard when the firemen were using the phone. The one said as he hurried to them, "We gotta get back. Seven's exploding!" (notice he did NOT say "Seven collapsed")
Also, there was the explosion that caused Barry Jennings and Hess to be trapped on the eighth floor of wtc 7.
So yes, EXPLOSIONS, not just sound of weight of building having collapsed.
Want DP delivered to your inbox daily? Subscribe here: