Yup, I remember that episode. It was a bonus episode that the creators made using ideas that they received from their fans/public. The episode was when he found a genie in his bottle of beer, and I remember that his second wish was he would have his own theme music....so everything and everywhere he went, there would be a whole orchestral score going on in the background.....hehehe, I will never forget that.
At some point he steps on a bus, and one big guy finds the music annoying, so he threatens to break Peters bones....so, Peter scared, wishes not to have any bones....
r2rX

(completely irrelevant information)