He stopped at the end of the pipeline.
The woman over there also asked,
"Did you find anything?"
"I didn't expect there to be water here. I suspect there's some large equipment that needs cooling, hence the ventilation pipeline connected here. It's highly likely water-cooled and still operational. Let me dive down and take a look."
"You're wearing that gear and jumping into the water; don't drown yourself. I don't want to go down to collect your corpse."
The Arkham Suit from the Exchange Coupon has quite a bit of bulletproof insert and metal content, along with the weight of the prosthetic, basically making it sink without a trace.
"I won't."
"Why not?"
"Because, I'm Batman!"
Of course, it wasn't because of such a ridiculous reason, but simply because the Exchange Coupon had prepared the appropriate tools in advance.
Having spent so much time in the sewers, it's only prudent to have some preparations.
