Today I broke a wall at work while (upon request) attempting to pop a colleague's balloon. The ensuing damage was quite well regarded by all present, and even painted by one our copywriters to reveal the outline of a ladybird.

Real estate department failed to appreciate the funny side of this situation. I suspect they would have agreed that this artifact was well worth preserving had they been present earlier to:
1. witness the action that followed my general announcement: "Hey everyone! Watch this!"
or
2. observe my momentary state of confusion while I studied the debris on the floor, wondering why the balloon was filled with plaster.

In any case, lesson learned: Only pop balloons on supporting walls.