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Took objects from drug store, created a specialty back
pack with a rockin' stereo. It has a radio, subwoofer, PA
system, mp3 player, and 20-50 watts of power. It will
hard. The inner tube arm straps are from a bicycle. They
let the bag bounce smoothly on bumps instead of
also don't absorb sweat, thus don't stink after hot
bike rides. The mesh backing keeps the pack off of you
and keeps your back dry. See link for demo:
The Rock Sack
Demonstration of The Rock Sack [haikunick, Mar 21 2009]
||might be useful as a warning device for overtaking people on combined bicycle/walking trails... and only good as long you know that the people who will be overtaking you are wearing a much louder one.
||But as far as using it while riding on the street: you entering the Darwin Awards competition ?