John Lassiter was a Disney animator in the early 1980s before coming to Pixar. He had this idea to create a short film which integrated computer generated graphics with hand-drawn animation. He, along with other Disney animators, visited George Lucas' ILM studios in the graphic arts division (where Pixar was born). He became amazed at the work they were doing with computer animation and decided to pitch his idea to his project managers at Disney. The managers listened to his ideas and shortly after that fired him. The animation team felt, at the time, that computers had no place in animated films. Within a few months, Lassiter was hired by what would become Pixar Studios.
Lassiter would go on to actually make the film which is what you can see below:
So, here is the message that I took away from this: Be bold. Be daring. Be audacious. If your employer values you and values creative endeavors, you are set. If not, then find a place that will and you will better off because of it.