One guy is sitting in front of a Kroeger, when another guy starts in with some improvisational singing, before a third guy spontaneously jumps in. What happens is this amazing collobration of three different voices.
So don't always ignore those artists or musicians on the street. They are adding so much beauty into this world. Its time we open our eyes and start seeing one another! What if you later found out you were the one on video walked past, eyes diverted, from this awesome occurrence?