Shout at her to stop

You round the corner fully and shout her name to get her attention. She looks like a deer in headlights as she stares at you.

"Stop! ....Why are you doing that to him?" You ask, "You told me you didn't agree with the purge!"

She continues watching you silently for a few seconds before replying with a smile, "...Because it's fun, babe! I had hoped you wouldn't think of me as one of these girls who does this but-"

She pauses for a split second as the mans left ball gives up in her hands. He is now nutless.

"...but in truth, I am..."

You slowly take a step back despite the distance between you as she stands up, not knowing how to react to what you are seeing or hearing. She continues speaking while slowly walking towards you, as the man she has just castrated crawls a foot or two away from her before passing out from the pain.

"I hope we can carry on despite... this?", she asks while gesturing to the man, "It's only one night a year, and I'm still the same girl! Plus, now that you know I can protect you from the other girls!" she finishes her monologue with a smile, and you are now standing face to face.