Kirbe air ride: confusion!

[Crazy Hand]

Okay, so on the main site, there is the city trial backside song.
Where is it from? What is the backside?
I know I've heard it, and I own air ride, but I can't place my finger on exactly where it's from.
Does anyone know?

[mikey]

Um, the back side of City Trial?
Just a guess...

[JDMEK5]

City Trial (Backside) is an alternate song that sometimes plays during an otherwise ordinary match of City Trial. Nothing special about it, nor is there any way to make it play more often. I'm not sure what the chances of it playing are, but it doesn't have any special significance. As far as I know anyways.
(Play lots of City Trial matches and see if you get it eventually)

[Crazy Hand]

OH! That makes way more sense than some secret area, because I thought I had found every secret tunnel.

[JDMEK5]

No, I remember the song starting as the machine flew down, kirby hopped on, and the countdown started. It's basically just an easter egg. (A completely-irrelevant-to-everything easter egg)