What is the significance of the dance Harrison and the ballerina share?

In Vonnegut's future America, the Constitution has been amended to create an equal society, where every citizen is completely equal in every facet of life. In order to achieve complete equality, talented individuals are forced to wear cumbersome, oppressive handicaps. The protagonist of the story, Harrison Bergeron, embodies every aspect of physical and mental perfection and is considered a threat to the government. After Harrison escapes from prison, he takes over a news station, declares himself Emperor of the United States, and dramatically throws off his cumbersome handicaps. He then says,

"I shall now select my Empress!...Let the first woman who dares rise to her feet claim her mate and her throne!" (Vonnegut, 4).

A ballerina then stands to her feet and approaches Harrison, who strips off her handicaps and the two characters gracefully jump thirty feet into the air, where they kiss the ceiling and each other.
Harrison and the ballerina's graceful dance in mid-air symbolically represents a celebration of independence, talent, and uniqueness. Their act of rebellion depicts the positive aspects of non-conformity and the liberty to express one's talent, beauty, and physical abilities. In a society determined to restrict citizens with talent in order to maintain equality, Harrison and the ballerina challenge the oppressive government policies by publicly displaying their natural talents in a beautiful, artistic manner.

The significance of the dance lies in its inherently subversive nature. This is a rigidly egalitarian society in which absolute equality is ruthlessly enforced by the government. Those deemed too intelligent, talented or good-looking are forced by the authorities to wear what are called "handicaps" in order to keep them down to the general level of mediocrity. Ballet dancers, for example, are forcibly weighed down and must wear masks when performing so that their natural beauty and gracefulness are concealed.
Harrison's dance with the ballerina—or "The Empress" as he calls her—takes place right after they've removed their handicaps. Now, at long last, they feel free, and in a burst of exuberance they fly to the ceiling before pausing in midair to kiss. The dance represents a bold challenge to the norms of this dystopian society. It is an unapologetic celebration of diversity and of humankind's many and varied talents, abilities, and aptitudes.