A year ago, Bruce would have assumed it to be bragging; today he knows better. It's not lost on him, the sheer amount of effort it must take for Clark to keep from toppling and breaking everything around him. Bruce has paid attention to and moderated his own strength before, shaking hands or holding a woman or trying not to break a criminal too badly, but they're all split-atom sized issues in comparison.

"You could." Deceptively neutral. Bruce drains what's left in the bottle. If Clark knows what he's doing, really knows what he's doing, then fights like ones with Zod can be over fast, and be more contained during. Because not every conflict is going to be held in abandoned and condemned buildings where over-invested old men are trying to make unhinged points.

(Bruce has thought if it a number of times, how if he really wanted to kill Superman, he could have just killed Superman. If he'd brought the spear with him, then the first time the object of his obsession fell to his knees choking on a cloud of sickly green, it'd have been over. But then Batman would have lived, and that wasn't a part of his plan.)

"If you wanted."