Cade flinches when he's tapped on the shoulder, but quickly becomes aware of what's happening. He nods as he presses the flats of his hands against the wall, and when prompted, obediently replies, "stop." There's a bit of impatience to the word as well-- his stomach has been twisting itself in knots since he arrived, and now that they're finally on the verge of getting it over with, it seems like Zevran is stalling.
Cade braces himself, willing it to start.