Well to answer your question you would need to be specific. According to research (this is just speculation) depending on how you die is what happens when you die. Say you die from Carbon Monoixde poisoning or you down. They say it's like going to sleep and never waking up. Other deaths such as body deaths can be much different seeing as how your brain will be active for a little bit but it will slowly shut down due to lack of oxyhen and you will black our forever like fainting or getting knocked out unconsious. Those are some of my thearoies anyways. They make sense.