That's... a bit more than he was expecting, to be honest, and it does make him pause for a minute. He swallows.
"I'm sorry," he says eventually. "That sounds like hell. I didn't realise it would be quite that bad."
He wonders if Kitty knew; knows that they'd still had to go ahead with it anyway because they hadn't been able to find a more humane way to deal with him. He knows what it's like living with that kind of knowledge. Living with the consequences of what you've had to do to others is all a part of the job, where they're concerned.
He looks at Spike, jaw tightening as he thinks back to his video call with Tyki. "So why all the threats and bluster yesterday, then? He didn't sound like someone who wouldn't harm a flea!"