When you fall unconcious you arrive at the next moment of conciousness immediately. You step out of time for a while. However if your human body loses the functionality to wake up an eternity could go by in an instant and you will arrive in your next state of being.
For me that is with Christ. However from a non religous view if everything was random chance your exact same conciousness has an infinite chance of existing again so complete death would be an instant movement to the next concious moment. By infinite chance you may even get to an incarnation of immortality. You made it once if your reading this!
However I'll stick with Jesus but I don't mind a bit of quantum physics. Even if conciousness is in the brain where is the brain? - It's non local.