Jack-Jack Attack is a 2005 short film produced by Pixar based upon their film The Incredibles. Unlike many of their previous shorts, it was not given a theatrical release, but was included on the DVD release of the film. The idea for this short came from an idea for a scene originally considered for inclusion in The Incredibles film; it was cut from the feature and subsequently expanded into this short. The short is based on the youngest member of the superhero Parr family: the baby, Jack-Jack. From The Incredibles, the audience knows that Jack-Jack's babysitter Kari McKeen started experiencing difficulty with him shortly after hanging up the phone with his mother, Helen Parr (also known as Elastigirl or Mrs. Incredible).

This short film shows Rick Dicker, a government agent assigned to aid "supers" in maintaining their anonymity, interrogating Kari about what happened when she was babysitting.

Kari calls Mrs. Parr to assure her that she can take care of Jack-Jack, but is cut off by the plane being fired upon. Thinking nothing is wrong, Kari asks Jack-Jack if he is ready for some "neurological stimulation". She puts on Mozart's Piano Sonata No. 11 for him, which has the result of Jack-Jack having an epiphany about his latent superpowers.