or don't try to chicken out at the last second...
that's the problem with people who only think they want to die.. if you're going to do it, there are quite a few other more sure ways I can think of.. of course they would require a little more thinking than parking your dumb ass on a train track.
and would be a little more spectacular.
strap some dynomite to yourself, down a bottle of percaset with a fifth of whiskey, light the fuse cut your wrists and jump from a tall bridge in the winter... multiple redundancies are good
