He looks at Nightwing with an expression on his face that tells him chuckling might not have been the expected answer. He's still annoyed, clearly, at least.
"Twelve," he says shortly. He doesn't need to expand on that.
The elevator stops and the door opens to a completely different Cave than the one he knows. It's kind of weird how walking (swimming) in the place had been, overall, the same but the inside is -
Dinosaur-left. Only one car? And why is there a Robin costume in there? It still looks enough like the Cave but the feeling is. Just different. He's not comfortable in here, like if he's intruding.