"You're a cartoon character," says Batman. But it's apparent by now that when Clark explains stuff like that, Bruce is just impressed; and of course he would be, here, when beluga whales are inspiring him to smile openly, and he's captured video footage of Clark being ridiculous with otters just because he doesn't think his heart can take thinking something like that might be lost in only his own suspect memory.

He's standing almost closer than necessary, to hold hands. Not to cover it up. Like some part of him thinks it's too fragile to withstand a bold two-foot distance, arms jostling with the cadence of their footsteps. Something to be protected instead.

What's next? Petting stingrays? Seals?