In a previous post where I discussed the concept of ‘play’ I used a definition from Mark Rowlands

Play is activity whose goal is internal or intrinsic to it. In its pure form, play has no external purpose or reward. We play just to play.

Here’s a beautiful Flash Mob video clip from YouTube that illustrate ‘play just to play’, both by the young girl who takes a risk giving money to a playing-less musician, and the beautiful result of her risking to play with him to begin with.