How did acrobatics make Nicholas Brothers tap routines distinctive?

The Nicholas Brothers developed a unique style known as "classical tap," which distinguished itself by seamlessly integrating jazz dance, ballet, and high-level acrobatics into their tap dancing routines.1

Their use of acrobatics allowed them to perform feats of athleticism that elevated their act beyond traditional "hoofing." By incorporating daring movements—such as leaping onto pianos, executing full splits, and sliding down ramps—they transformed their performances into a display of suppleness, strength, and fearlessness. This integration was perhaps most famously captured in the film Stormy Weather (1943), where they utilized their acrobatic prowess to navigate bandstands and stairways in a complex, high-energy routine that remains a hallmark of their legacy.1