Today, well yesterday for me, there was an event going on in three cities that was put together by a group called improv everywhere. I believe they got their start in New York and i suppose have a bit of a cult following now. Today they will have a group of people all listening to mp3 players at the same time and place. They will all be following instructions and it will create a happening. I don't know how else to explain it. Anyway I have always been a fan of the musical. At times I have felt the need to break into song. This group did this bit of improv which made me laugh.
I hope you enjoy. go to their website. The thing that i like about the whole process is that it engages people. People stop and react and it is great.