If you don't say them all, it won't work.

[Though he has no idea how it'll affect him. He remembers the way it feels when the words are being said. Remembers the panic that sets in. The pain in his chest that comes with all sense of control and autonomy being torn from him. It's a feeling he doesn't want to associate with Sam in any way. A sentiment that he wants to keep far from their relationship.

But as long as they're both on this station and the words remain active, there really is no other option. No other person here he could trust to use them the right way.]

When I- [He lets out a breath, before he straightens back up again. Before he cuts off contact again. Albeit with an apologetic look on his face at the action. But he needs to distance himself for this. Needs to take the time to warn Sam, however much he can.]

Once you've said the words, you'll be the only one I'll listen to. Won't do anything without you telling me to do it first. If you try to call me Bucky, or James, it's just gonna confuse me.

[Though that's also what he knows he'll need. He just can't risk Sam getting hurt further in the process.]

Take me to one of the empty rooms and lock me in. If you can't talk me down from outside, then I need you to knock me out.