Ballet as Acrobat
Here's a video of a ballet. Incredibly beautiful.
Ballet: How Do Ballet Dancers Dance on Tiptoe?
how do ballet dancers do those tiptoe?
they wear a special shoe, called Pointe shoe. It has a little box in front.
Thanks to Kiara Smythe in Second Life for the answer.
For contrast, see the beauty of masculine acrobat: Acrobatic B-boying Dance (breakdancing) Videos.