is the act of putting grease or soap on the tracks
some sort of childhood prank like putting a penny on
and picking up a squished coin after the train passes?

while looking for this i found this song....
this "kid" Ben has performed this song live
on David Letterman...here his amazing 82 year
old grandma dances to the song...what a mover!

http://www.youtube.com/watch?v=nvuRN-mfM4g&feature=related