I challenge YOU (you know who you are [if you're not sure if it's you, assume it's you]) to listen to this entire Nyan Cat song, starting whenever you click on the little "Play" button. You don't have to start now, but once you start, you can't stop.
Not even once.
You can do whatever you want on the interwebz while it's playing in the background, but you still have to be able to hear it. For as long as it takes. I am not responsible if you puke rainbows during or after this ordeal.
Go.