I want to die via apocalyptic tidal wave.  You'd know you're going down, but at the same time you'd be all, "Whoa, dude.  Check that out... I'm not even going to feel this.  Holy shit, look at that!  Whoooooaa!"  Just think about what that would look like.  It would be the most horrifying/visually stunning/sweetest thing you'd ever see.  I also like the idea of mankind being erased from existence.  Equilibrium, son.  One of my fantasies is to barely survive a disaster.  Like, almost fall into the center of the Earth during an earthquake.  Or outrun a tornado.  Or survive a nuclear blast.  Or become a member of the rebel squadron when China takes over the world.