Yellow gas

Nicole may be fast, but you are faster, and you try blasting her in the face with more of your fog. The adrenaline gets to you, though, and instead of a simple exhaled cloud, you end up yelling at her. "AAAAAAAAHH!", you roar, and the vapor that you release is now colored a bright yellow.

Nicole screams in response as she flies back, waving madly in an attempt to avoid breathing in your poison, but her reaction is a moment too late. She backs up and hits the opposite wall, her coughing giving way to hyperventilation as she sees you. Nicole's brown eyes widen and her entire body begins to tremble and shake. She stammers in a high-pitched, terrified voice. "Uh- uh- uh- pl- PLEASE DON- DON'T HURT ME PLEASE NONONOOOOO", sinking down the wall and staring in fear.

You just blink once or twice. "... Huh?" and she visibly flinches. Clearly you accidentally gave her some sort of... fear gas?

You take a step towards her and she rapidly looks around for somewhere, anywhere, to hide, but there isn't one. And as you approach her, you see a stain rapidly spreading along the crotch of her scrubs, and the faint smell of urine fills the room. Nicole is too terrified to scream.

(At this point you can backtrack to the "Green" option to continue, try a different color, or write your own continuation. You're an adult. Make a decision.)