My sister told me about this song:
Video--"Skullcrusher Mountain" by Jonathan Coulton (The link leads to "Google France," so of course most of the page is in French, but just let it load.)
These are the lyrics. (It would probably be good to read these while listening to the song, because the audio is kind of funky.)

The title may a bit daunting to some, but the song itself is very funny and cute, in a mad scientist sort of way.... ninja X3