Got a little side tracked while waiting for the system to get me reply. I really loved your comment a lot. I'm glad I'm not the only one who hates the hat bob. I didn't think it was good at any point in time. Was hoping I'd warm up to it. That's still a definite nope.
His coat collar was actually meant to also bob up and down, too, but I somehow screwed up somewhere along the line, and it got completely missed, even though it existed in the flat-color staged just before shading, and then I just didn't bother to go back and fix it.

You're also right about the flap movement for another reason: the type of hat used by detectives of the era were fairly stiff-brimmed, so the flop of it wouldn't make sense. I think I'll chuck the hat movement entirely.