"You won't let me leave. You said it yourself." There's too much of a tremble to his tone for him to really sell it as a threat, but maybe Shepard knows a thing or two about scared animals, about cornered things, about dogs gone rabid. Maybe she knows that when they feel backed into a corner, when they feel threatened, they'll bite and tear and gnaw at their own legs to work their way out of the teeth of the trap.

That's what he is, isn't it? Unpredictable. Rabid.

Needs to be put down.

"So you're gonna remember how it felt." He's not shouting, yet, but the words are getting louder. Louder. Louder. Louder. "If you don't, you're gonna stop me."

If he doesn't, he's trapped, same as he ever was.

"And that's why I can't. And I won't."