Death? Bah! I laugh in the face of death! ... And then I crawl under a bed and stay really quiet until it goes away.
I recall a non-lucid dream I had a while back wherein I realized I was going to be dead in a matter of seconds, and there was absolutely nothing I could do about it (think thermonuclear device). There was no fear, no panic, no nothing. I simply understood what was happening and accepted it. My only thought was "I wonder what being disintegrated feels like". At the time, my model of reality was that I was going to step into non-existence. I had no problem with it.
Through my current model of reality, my thoughts would've been "I guess I'm going home", and possibly "Reassemble for debriefing and cocktails at 1900 hours NPT (Non-Physical Time)".