Sighing, she continued her track around the building, following the shadows (never knew when there would be armed guards to greet her). Finally, the ventilation ducts. Unscrewing the cover from its place, Gina slid inside, careful to pull the vent cover back into place. She needn't be attracting more attention. Satisfied that she had located the main duct, she dropped down into what seemed like an empty room and slipped into her gas mask. Pulling a container of compressed gas from her pocket, Gina chucked it as far down the vent as she could manage.
Keeping a mental inventory of the security cameras in use (thankful that she was mostly hidden by her life-saving mask), she waited several minutes for the gas to disperse, for the emergency sirens to sound in the building. Now it was time to move. Finding her way out, Gina was pleased to see several bodies line the corridor already. After checking their vitals, none of them were alive. She cased the building, shooting the stray survivors she found, ending their misery.
Before long, she came across a lab, surrounded entirely by glass with one small man sitting inside it in a corner. His hand was shaking over the emergency button (he had surely been the one to press it) and his eyes were fixated on a dead colleague, positioned just outside the glass. Intentionally making a noise, the man's gaze shot to her, fear evident in his eyes. He looked pathetic, weak, what with his long hair tied back behind him, thick, round glasses, and thin frame, his lab coat noticeably too large for him. Without much effort, she could probably break him over her knee...and that's just what she needed. Maybe she could use him, to stop this infernal noise in the least.