"Hey, Topher," Karla said, grabbing him by the collar and starting to slowly step backwards. "Why don't you shut the Hell up?"

And maybe start unobtrusively walking? Away?

"What are the rules?" she asked, trying to call in her sword, or her knives, or, Hell's fire, even a paperweight would do. "There's nothing about coming in and vanishing people away? Because that's both rude and a really stupid idea."

Yay bravado!