I know. It takes a lot of work just to prep the parts before they are put together for the animation process. This isn't one of my originals, but whoever did it did a great job. I'd swear Terry Gilliam from Monty Python did it.
Not sure if Banksy is into animation. While I can't lay claim to this work, I can say that I've done animations like this in the past. It's more in the style of Terry Gilliam from Monty Python's Flying Circus.