It's important for Pixar to allow another emotion to control Riley in a potential Inside Out 3 movie.

Nearby, there is a version of the control panel from the movie. It's covered in buttons, levers and dials that produce all kinds of sounds.

Director Kelsey Mann and producer Mark Nielsen of the film Inside Out 2. PHOTO: REUTERS This is not the first time that Pixar has tackled a story about a teen flooded with strange new emotions.