Press the green flag and click on the buttons for different reversed LOTR songs. You can also click them all and listen to the awesome reversed din. Press the green flag again to reset it, or just listen to the end of the song.
Thanks to @microfo for the original project. Some of them refused to reverse in editing and I just couldn't reverse May It Be. Headphone users turn the volume down for They're Taking The Hobbits To Isengard.