Play this clip (20 seconds) from the score of the movie Inception:
Now, play this opening (10 seconds) from Edith Piaf's Non, je ne regrette rien ― the song they use in the movie Inception to signal people to exit dreams.
Now listen to what happens when you slow down that opening:
It should sound familiar. In the dreams in Inception time gets slowed down.
I should note that this is not my original work here. The writers at Cracked wrote up analysis of this based on a YouTube video uploaded by user:camiam321.
The only thing I brought to the table was use JavaScript and the Web Audio API to do all of the slowing down and playing the clips over each other.