I ran across this item and found it somewhat amusing. The idea could have potential as a display layout if it was a helix with grades and just certain portions of track visible as on a mountainside.
http://pop.h-cdn.co/assets/15/...twirlingtwirling.gif
Reminds me of how the old 8-track tapes worked with a continuous loop. Eventually the tapes tended to bind from the constant sliding friction.