Kitty felt it too and nearly lost her footing, but kept going, eventually making her way to the underground complex of the mansion where Kurt and the other zombies were kept. The rumble seemed to have riled them up, or maybe it was the smell of flesh, and Kitty paid less mind to the groans and thrashing elicited. Panting, she stopped just in front of Kurt's cell, far enough to be out of reach, and waited for the girl--wait--Mystique to show up to say, "You can't." Kitty shook her head. "You see what he is now? You can't take him." And it wasn't even all because Kurt was a zombie. It was just as equally for selfish reasons and quite frankly, Kitty didn't care. Kurt was her friend. "If he gets let loose, he will hurt people." That, or someone would hurt him. Kitty sure as hell was not willing to take that risk.