Trebuchet Business Card - Trebucard

The Trebucard is a business card sized mini trebuchet. It is designed to fire jumbo paper clips and uses 16 pennies as a counter-weight. Unlike a traditional trebuchet the Trebucard uses the surface it is resting on as a pivot rather than being mounted on a frame.

Demonstration video here: http://www.youtube.com/watch?v=J6SAxqjxHYk

I have another version that is more optimized for performance and doesn't require you to tape the pennies together, but it is more fragile. I'll try to post tha