Puts me in mind of the [YOUTUBE="http://www.youtube.com/watch?v=mn0xKPv9jDY"]Atheist Sneeze.[/YOUTUBE]
When you die, nothing happens.
I think that the belief of an afterlife is based on the belief that everything is continuous: there was no beginning, and there is no end. The universe goes on and on. That the soul cannot die. Etc. I believe that a soul can be killed, but it doesn't necessarily die with the body. The body is just a shell for the soul.
I don't think I'm wrong on this, but then who DOES think they're wrong about their beliefs? The most you can hope for is someone who is big enough to allow for the possibility that they COULD be wrong. In my years of contact with Christians (Southern Baptist, the worst kind of Baptist), who believed nothing but what the Bible says and allowed no room for anything else, I was completely blown away when my (Christian) therapist said, "...that's what I believe. But hey, I could be wrong."
It doesn't really matter what you believe in, just as long as you believe in something. Allow for the possibility of being wrong. I have no problem with anyone's beliefs under two conditions: you don't go around shoving it down people's throats and it doesn't harm someone. If it does either, expect to be fought.