((EDITED TO INCORPORATE THE PREVIOUS POST, WHICH WAS WRITTEN WHILE I WAS TYPING THIS ONE
))
The gas was pouring in through the vents. The heroine didn't have more than a few seconds to act. Reaching to a pouch on the back of her belt, she pulled out two small orbs. Clicking a button on each, she chucked them at the wall. The orbs exploded with far more punch than one would think them able to hold, blowing a sizable hole. Using her cape as a makeshift fan, Batgirl tried her best to disperse the gas through the hole. It wasn't a perfect plan by any means, but it was something.
"I may have to fine you for that." came a voice. It was the Commissioner! He was standing, and looking at her. Cass rushed to his side and gave him the re-breather she had on her belt. "Here." was all she said. She wasn't worried about herself; her mask would protect her for long enough. It was the drugged denizens she needed to protect. Rushing to the smallest in frame first, she lifted them up and ran them away from the gas-spewing vents. Gordon followed suit, moving those who were the most in danger of the gas while in their drugged state. Some of those who had not drank the drink came out of their hiding...and helped. Let it not be said that humanity is completely lost.
The plan mostly worked. She was able to move the people most in danger, while the several people who had avoided the drugged drink had helped move others. The hole int he wall gave the gas extra space to disperse into.
However, the plan wasn't flawless. One by one, the make-shift volunteers started to drop. The Commissioner's borrowed re-breather was protecting him, but Cass began to feel dizzy herself. Leaning up against a wall, Batgirl willed herself to make it to a nearby storage closet, entering and collapsing inside once the door was shut. She was angry, but no longer able to stay conscious.
****
She didn't know how long it'd been, but she could hear commotion outside. Recalling what had happened, the addled heroine listened through the door.
"...No casualties?" she heard the Commissioner ask
"No sir," came a male reply, "Some minor injuries, and a lot of officers still feel woozy and should be checked out, but nothing beyond that."
"Except the stolen diamond." the Commissioner retorted. "This is not good, not for Gotham, not for the U.S. Khandaq already has shakey relations with the rest of the world, and a super-powered leader that rivals Superman. We need to recover that diamond and recover it fast!"
The closet door opened. It was a young woman officer. Cass put finger to her own mouth, hoping that this officer would listen to her and trust her rather than call attention the the vigilante in the closet. The girl officer nodded and shut the door again. Thank goodness for Bat-supporters in the GCPD.
Batgirl peeked through the door a crack and saw that most of the attention was on the hole blasted in the wall (she winced under her mask about that...) and the shattered case. She then made a break for it, a black blur rushing along the wall and out of the room. Soon she was at the stairs, an officer standing in front of the door. She tossed a harmless round pellet, usually used in bunches to trip a villain up, down the hall. When it hit, the officer turned that direction. "Who's there?" he asked to nothing, moving away from the stair entryway. Cass was in before he turned around.
She made her way to the roof, dashed out, and leaped into the air over the edge of the roof, firing her line across, catching, and swinging across an entire city block in jsut a few seconds. She landed on another roof and began jumping from roof to roof. She needed to follow the tracker...but first, she needed the equipment to do so, and being freshly back in Gotham, she wasn't quite prepared yet. Time was of the essense, though, as the henchmen could potentially discover the bug at any time.
Batgirl was dissapointed in herself for not stopping the robbery, but she would learn about this character she was up against. Next time they met, he would face her on an even plane.