1986’s The Great Mouse Detective, Disney’s 26th animated feature, is one of the earliest uses of computer animation. During the film's climax, Basil faces off against his arch nemesis Ratigan, which takes place in London’s Clock Tower, Big Ben.

The two-minute sequence had the characters moving through as many as 54 moving clock parts! It took several months to create the internal workings of the famous clock. All this allowed the animators to create “steady cam” type shots vs the traditional animation that was limited to tracking and panning left to right on flat pieces of artwork.

This paved the way for the ballroom scene in Beauty and the Beast(1991)