Good question, for your romero Z/shuffler I would expect to see a few people running and screaming, but the majority confused e.g. "What's up with my husband?" Cliche I know, but very likely that most people can't identify a zombie at a glance. Sprinters/chemically enhanced zombies would be mayhem, screaming, car-crashes, packs of people running every which way.
If it were a voodoo high priest, I can't see the same 'tell-tale' signs, it would be a more clandestine, surreptitious thing. A person here, a person there with an air of suspicion around the neighbourhood, it would be intangible but you could probably 'sense' the unease.
I've been quizzing myself on what I'd do in all situations/all varieties of zombies.
Nice weapon BTW, I can see it being very effective in extreme close-quarters, like a bayonet in the trenches.