Why you should ignore emergency procedures

In a very interesting WIRED article, a summary is made of a NIST report about why people survived or died in the 9/11 World Trade Centre attacks. Basically, the report says that around 3000 lives were saved because people ignored the emergency procedures - instructions were given to them to stay put or use the stairs to get out - and used elevators to get out of the buildings. There is an interesting PDF presentation about it at the NIST website. The complete report is here, with an executive summary here. In particular, the executive summary says:

More than twice as many occupants were killed in WTC 1 as WTC 2, largely due
to the fact that occupants in WTC 2 used the 16 minutes between the attacks on WTC 1 and WTC 2 to begin evacuating, including the use of elevators by some occupants in WTC 2.