http://www.youtube.com/watch?v=u_jZbcykhpM

Thought that was neat and to me this is avant-garde ..and shares similarities with your description eventhough certainly no people or arms or ballet
if you ask me
Whether someone wants to call something this or that or avant-garde or not
I don't think it matters
Seems you just have a certain word on your tongue you cant spit out so hopefully gets it