Mary heard some murmuring down below, and when she looked down she could see a number of tiny little people gathering around her. She giggled and squeaked at the situation.
"You all gathered to watch me grow?" she asked. "Well watch this!" She continued to allow air to flow into her, and the people on the ground below became like specs of dust. She was even having trouble seeing around her feet thanks to her ballooning body. Soon she was so tall and so round she couldn't see much of what was below her at all, and had to resort to watching the horizon and scanning for noticeable landmarks.
Meanwhile, down below, the hundreds of people watching the monstrous behemoth tiger woman began gasping...but not entirely out of shock. Mary's continued inflating was pumping air out of the atmosphere and hoarding it all inside her body. The air slowly became thinner and thinner, and people began to choke and collapse on the street. Many ran into their homes, taking their spouses and children with them, and desperately hoped the air inside would remain. Despite their efforts to seal doorways and windows, many of them began to perish.
Mary, meanwhile, was blissfully unaware of the calamity befalling the worls around her. At seven hundred feet and rising, she was focused more on watching the sky above her head growing a darker shade of blue. She wondered if she would get big enough to see the stars.