This is a musical part of a song that is at the vocal recording stage.
Have you ever opened one song in your sequencer and loaded samples from another one into your sampler? I have. It is an example of such unintended work
. Just added a rhythm, slowed down and that's it! Look at the piano part. It is that rhythmical because there were loops under those keys earlier (and there were some cc# changes so the piano sounds not in tune sometimes - great for me!)
Sir