The balance beam is a visual representation of the Equalities act, which is designed to make the beam balance for those covered by it.

As the beam is so perfectly balanced, I wanted to demonstrate that it was genuinely balanced - so after a 5 second delay, a single raindrop (Mass 0.04) on the beam, upsetting the balance.  I chose the right hand side of the beam simply because it was a larger target, and demonstrated the balance better.