Floating arm trebuchet (dimes and pennies)

This trebuchet uses a floating arm rather than a fixed arm. That means that the weights can fall completely vertical resulting in a more efficient and powerful throw compared to standard trebuchet designs. See a test firing shot here: http://i.imgur.com/9QZHuB0.gif

It requires 2 toothpicks, some string, and 32 dimes to fill the weights.