Soundsystems on two wheels

Made in Queens is a documentary about these yong folks who build complete soundsystems on their bikes. When we were young we attached a washing peg with a playing card to our wheel so it made a sound like 'tttrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr' when you drove your bmx. These youngsters do this. Creative, we say.