She let the door close after he passed and nodded. "I live here. On the tenth floor. It would probably be kind of weird if I didn't live here. Like...who camps out in strange buildings lobbies?" Not her. She only camps out in her own lobby thank you very much.
When he set down the structure, she handed him her soda, her ipod and her bag. She bent down and, after a moment of silent reflection over the physical manifestation of her victory, she brought the lighter forward, ignited a flame, and set the tiny, billowing flag on fire.
She stepped away from the fire and stood beside her companion, holding out her hand to reclaim her stuff. The bag would be set aside, but the soda would be opened and the music would be turned on and the ear buds given. Then they could sit back and take a moment to reflect on their achievement.