"Probably for the best." The fog is Not For Fooling With, as far as Hellboy is concerned.

"Hmpf," he sniffs grumpily. "Don't think we have a Gotham, back home. If I end in one, though... well, there'd probably be my kind of weird, to bring me there, but after that, I'd have to wander around a bit, have some conversations." He lazily raises his mighty stony fist to illustrate the language he'd use. "Not my usual line, but I can make an exception."