Fred chuckled at George's remark on Umridge before placing his supplied out as well. With flicks of their wands, the swamp began to grow before their eyes. It was horrid, really. Filthy and stinky, and covered the corridor wall-to-wall, end-to-end. He and George had really out-done themselves this time.
When it was all complete, they added a few finishing touches and Fred stepped back to admire their work. He knew it had taken more time than it felt like, so they should hurry along, but he had to. "We're bloody brilliant," he said, smiling widely at George.