I get the heck out, period. Even if the alarm went off every day for a week before that and they were all false alarms.

Is it a real fire or a false alarm? I don't know unless I see smoke or flames. But I'm not betting my life on a hunch. As someone pointed out in the other thread, you have a LOT less time to react than most people think. A lot of people believe they'll have 5 minutes or more to decide what to do. In most major fires, 1 minute would have been pushing it.

I know a lot about fire codes because it's my job. Every four years the NFPA (National Fire Protection Association) comes out with a new code book. And every new version has tons of changes. Know how they come up with these changes? They review every death due to fire, and investigate how the lives could have been saved. They then re-write the codes to include the changes. The codes are said to be "written in blood" for that reason.