BE and HM: Have a look at PaperTiger's link to the Canadian Transportation Safety Board study of evacuations if you want to see a sample of the usual confusion and poor communications.
Interestingly there was a successful evacuation in YYC initiated by the passengers where the aircraft burned to the ground.
Don't worry, I'm strapped in until it's stopped and can tell the difference between increasing smoke and dissipating vapor.
And I won't be running in front of a fire truck. I'll be helping others off.