Writing about the light sticks at the Phish show reminded me of another concert experience when I saw Medeski Martin and Wood at one of their Halloween shows at the Beacon Theatre back in 2000 or 2001. It was pretty much the same idea but no glow sticks just glow rings. The glow rings would fly through the air and one by one they were taken apart and attached to each other until there was one long glow-in-the-dark snake being passed through the audience.