http://www.pbs.org/wgbh/nova/wtc/ab
From the Nova episode, "Why the towers fell", April 2002:
Brian Clark, an executive vice president at Euro Brokers, a brokerage firm that had offices on the 84th floor of 2 World Trade Center, was one of only four people to escape either tower from above the floors where the planes struck. In this interview for the NOVA program "Why the Towers Fell," assistant producer Matt Barrett simply let the camera roll as Clark told his astounding tale. Only slightly edited for clarity here, the interview reveals, in vividly recalled detail, how snap decisions, gut instinct, and a touch of luck worked together in Clark's favor and that of the man whose life he saved.