We just had a house fire over the holidays. It started in the basement, I was to the flames in 10 seconds, using an extinguisher another 5-6 seconds later. That failed... I spent another 30 seconds scrambling for anything that might suffocate the flames.... then I had to get out. I was 'upwind' of how the flames were spreading, but was not prepared for the power to suddenly cut out in a room now quickly filling with black smoke.
The whole ordeal was 1-2 minutes before I had to evacuate the house and watch it all burn, helplessly.
Even a good plan isn't always enough; most don't have any plan.