"He just thinks I'll hit you too hard," is mild, and Not Actually Funny. Whether it's a joke about Bruce having tried to hard to murder him is unclear - but unlikely, given the depth of his regret. Which means it's probably a self-depreciating joke, implying Alfred thinks Bruce might intentionally hurt himself.

It would be easy.

Anyway, into the elevator. The panel has no numbers, though some buttons are more worn than others; surely there can't be that many subterranean floors. Bruce pokes one and they're lowered to something in between the cave (The Cave) and the surface level. There's a modestly sized gym space, clean and stocked but still in a way that says it hasn't been used in a while. Bruce must get his own practice in elsewhere.

"Locker room's that way," Bruce says, tossing him the space clothes. It's more like a mini luxury hotel spa back there, but whatever.

While Clark is gone, Bruce turns off the CCTV for this room. When he returns, he's sliding a paper and bamboo screen over the mirrored wall, apparently not in the mood for the reflections.

"Pick up anything worthwhile from Diana?"