Dramatically staring off into space
I have one fucking image in my head that I cant get rid of that I thought you might like. McCree trusting Reyes enough to the point where he doesn't even flinch when he shoves a gun in his mouth. And when Reyes asks him to pull the trigger himself, he does it without hesitation. There's a satisfying click and Reyes pulls the gun out of his mouth, scratching Jesse's head, "Good boy."