The rule, I think, is: Do your homework, learn what there is to learn about the real world, and then when you get in the room, forget it all.
Michael LoceffWhat happens is that as the scripts are rewritten and re-edited in order to make the story more compelling, you sometimes end up with what you could call a time singularity - where there's no way for everything that happens to happen in real time. It's something that you need to wink at.
Michael LoceffTo be fair to ourselves, in almost every original script, the timing is actually worked out down to the minute.
Michael Loceff