Musicircus

Yesterday I saw a really interesting performance: "Musicircus," by John Cage.  Unfortunately, my camera had no battery life left, so this will remain unillustrated, unless something is eventually posted online.
The setting: the Herrenhäuser gardens, the large baroque gardens here.
More specifically, picture two small lawns planted with a grid of trees.  Aside from walkways, the lawns were closed in by green hedges.  Here is vaguely what it looks like, just picture much more green:

Interspersed across the lawns were various musicians, most on little platforms.  The musicians included: a chamber group, three solo violinists, a bagpiper, two opera singers, a harpist, a jazz trio, a mandolin ensemble, a bell choir, a toy pianist, and another mandolin (or was it some type of Asian lute?) player.  Then there were the unexpected, including a man who raked, two men who clapped wooden boards together and laughed into microphones, a slide whistle and squeeze horn player, and then a percussion ensemble who emerged from behind the hedges half way through.
The "score" of the concert was simply a rule: invite as many musicians as possible to come and play a piece of their choice together.  When my friend and I got there, the chamber ensemble was playing, as was one of the solo violinists.  The chamber group stopped, and then the mandolin ensemble started to play.  In the middle of their routine, the bagpiper started, and so it continued with groups fading in and out and overlapping each other.  Usually no more than three played at a time, but they all played at least once over the hour.
Throughout, the audience wandered back and forth between the current performers, forming circles around them.
It was really cool, and at times a little strange (ex: laughing men).  The audience wandered back and forth, wondering who would play next, and where to stand - right next to a group, or further away?  Music came at us from all around and blended together in interesting ways.  It felt a little surreal within the confines of the hedges; just like a little secret performance.  It actually seemed quite fitting for a baroque garden, where I feel like there are lots of little hidden areas waiting to be discovered.
Then finally with the last sounds of the bell choir, the performance ended.