Cool Mode is a mode in all the games (PaRappa the Rapper, Um Jammer Lammy, and PaRappa the Rapper 2) where you are able to freestyle. It is achieved when you play better in the stage then you should. When achieved, the teacher will leave the stage, allowing you to freestyle. If your freestyle isn't good enough, the teacher will come back.
Um Jammer Lammy Ver. of achieving Cool and failing Cool mode It could be used during Songs