Challenge

If you are looking for a challenge, I have one for you!

This challenge requires the knowledge of music.

In the background have a music of any sort. While that is playing try to think of a music and play it in your head, while at the same time singing/beat-boxing an actual song physically and tapping your head/feet out of tune to all the music that is playing.

I just thought of this right now and I actually bothered to go to the computer and type all this out.