"It's not your job to get yourself killed," Mikey snapped, putting more weight down on the map so it couldn't be pulled away. "It's not a mission. We can't apparate in if something goes wrong. What if you can't cast a patronus? What if a staircase doesn't come round in time?" What if any of a hundred other possible things happened and he was stuck in the Hall unable to help?
"Anyway, nobody goes out alone, right?" He gritted his teeth and tried to make more of an effort to control the level of his voice. "That's the big rule of zombie invasions. Alone people die first." Everybody knew that. "So -" shit, he actually didn't have a so. "So, I don't know." Wait, yes he did. "So one of us is coming with you. Or - or I turn every damn window and door in here to stone."