Don't know if its true or not. I doubt it. But even if it is true, i couldn't tell you because, well, i'm not dead.
Just to clarify, since you have an odd urgency to this question, the way this would work, if its true, its the last second or two before you die a quick, sudden death your life passes before your eyes. So you look up, see the bus coming at you, flash, dead. So if you're worrying about something you've seen and lived long enough to post a question here about it, then thats not how it would work.