While drawing this I remembered a common sound from when I was a kid. It was popular in my neighborhood to have these little multicolored pieces of plastic clipped on to your spokes. They were about the size of a marble. As you rode your bike at a low speed gravity would make them fall to the inside and then the outside of the wheel. There would be a distinctive metallic plink… plink… plink plink… plink… sound as they all zipped up and down the spokes. Then as you picked up speed there would be a sudden silence as they were all thrown to the outside of the wheel and held there by centrifugal force. As you reached your destination and glided to a stop you would once again hear plink… plink… plink plink… plink…