Alessia saw the beast turned boy come towards the exit so she quicly slinked away and heard the 3rd person arrive. she quickly hurried down the street as the situation was a bit hot for her. she took a path that she was pretty sure would not intersect with Arthur and Aqua's path. as she walked onto a street she saw a hybrid farther down the street. she stopped and hid then decided maybe she shouldn't, it might offend him and she really didn't need another hot head on her hands. so she walked out of hiding but still stayed close to the buildings as she was sure she could scale them and get through a window fast if he should prove hostile.

However before she got far a sudden acrid smell overtook her and she started coughing and scaled the building but the smell followed her she realized it had to be a gas an invisible gas but before she could react her grip slipped and she fell 2 floors. 

As Aqua's feet hit the pavement she buckled and smealt something odd a bitter smell that bit at her nose. She immediately tried covering her nose but it didn't work she could still smell it and she started feeling pretty woozy, she settled to her knees as she was suddenly pretty tired. It occurred it her what was going on but she couldn't do anything about it.
The smell hit Arthur just seconds before Aqua crumpled to the ground. He tried going for her but his legs decided, as they often did, not to support his weight anymore and he fell as well. His senses weren't the best but he could still tell a gas when he smealt one but as he was already on the ground there wasn't a lot he could do.