Sam moved up close to the bars, determined to hold the demon's attention, to give his brother time. "You're all talk," he said derisively. "I'm not surprised your boss doesn't want you down here alone with me."
She snarled and took a swipe through the bars at him with her knife. He leaned back, avoiding it easily.
"Whoops! Oh, wait, I get it." Sam hooted with laughter. "The bars aren't to keep me in, they're to keep you safe!"
Hissing with rage, she started to retort, then stiffened, eyes sparking, as Dean shoved the demon blade into her back.
"Boo!"