I had an idea to make T-shirts for various types of flash mob dancing, or singing, and whenever one or more met incidentally anywhere they would strut their stuff, and then just walk away. I love part of Flash Mob Dancing, they just walkaway. Normal, no big deal, this is how humans act.
And I love how they slowly keep adding people. And in the large terminals the rush down the stairs of young people swelling the ranks. And the audience responds Joyous, to me.