Be careful if you start playing saxophone on a NYC subway, because there's a non-zero chance another sax player will challenge you to a battle.
@PoliticalEd
No, I'm pretty sure this is organic. Unlike some of these current people on YouTube who post staged videos of themselves busking when some 'random' singer happens to drop by and start singing with him, and *shocked face* she's a fantastic singer (and of course very pretty).
@voltronic I think they are both obviously professionals, that's a pretty awesome jam if they don't know each other. I hope they exchanged info and will jam together again, they have some musical chemistry for sure!