The Adventures of André and Wally B. is an animated short made in 1984 by the Lucasfilm Computer Graphics Project, which was later spun out as a startup company called Pixar. Although it is technically not a Pixar short, the animation was by John Lasseter (who had originally made it for his son), who was working on his first computer animated project and would move on to become director and the chief creative officer at Pixar and Walt Disney Animation Studios.
Although the film terrified Lasseter’s son, the animation was groundbreaking at the time, and helped spark the film industry’s interest in computer animation.