David Rockefeller Watched the WTC attacks from his window on 9/11

David Rockefeller , lmuch as Larry Silverstein seem to have rehearsed carefully what he was going to say on this topic. Exact same words to describe this particular moment.
I find it extremely suspicious that David Rockefeller was exactly in a good spot to watch the 9/11 attacks. but moreover he says that he watched the building until they collapse which means he stayed at the 53th floor of the GE Building all this time. How did he know his building was safe? All the buildings were being evacuated when the 2nd plane hit the WTC. But Dave knew he was safe at the Rockefeller plaza, why is that? Was he alone or hanging with lucky Larry, drinking Champagne and thinking about all the money they were making out of this.