The entire flashback sequence done in storybook/WB style drawing. The entire first fight of mice vs. toys would also fit this.
"The Hard Nut", the campy "retro-modern" take on the ballet (with nods to the novel) by Mark Morris, is mostly Played for Laughs, with its Mouse King tricked out like late-career Elvis Presley, but of note is how the battle between toys and mice breaks out when a toy soldier shoots himself in the foot.
