"I'm not sure I could repeat or explain it if I wanted to," he assured her." He considered. "If I... or any other Blood male goes cold and you need to stop us, your best bet is to as politely as you can ask us a favor that is... obviously and ridiculously easy. Something you clearly could do for yourself. The request coming from a female who is not our enemy has a chance of slowing us down enough to actually start thinking again, and the absurdity might be enough to pull us the rest of the way back. Might. Once you learn Protocol, you'll learn better ways, but that is about the best stopgap I can think of, and is far better than trying to knock one of us out. And if it is someone other than me? Tell them I told you what to do and send them at me. I have a higher chance of survival if they're still ***** than anyone else on the train."

That last part was a lie, of course. He was male and Blood. He would be the most tempting target. But protecting is a right and he was claiming it.