This is really a very catchy song about dumb ways to die

http://www.youtube.com/watch?v=IJNR2EpS0jw

And the moral is just right, because truly, there are very few good reasons for entering train tracks.

Edit: There is now a real life version! Ye gods.

http://www.youtube.com/watch?v=OKczjG2Gj5U