Ski ballet was never an official Olympic event, yet it was featured in the 1988 and 1992 games as a demonstration sport. The fact that it never became an official event is surprising when looking at its origins, however.
In the early 1970s, there came a schism in the world of skiing. A new generation of athletes looked to buck the traditionalism of standard alpine skiing, and longed for new ways to innovate. What they came up with was freestyle skiing, also called hotdog skiing, also called acrobatic skiing, also called stunt skiing. And it was composed of three elements: moguls, aerials, and ski ballet.
Essentially, these innovators would get down the mountain in increasingly more artistic ways, from the pogo tricks of moguls to the vaulting acrobatics of the aerial portion, then finishing with more dance and flatland tricks on the slight incline of the end of the race.