name lips wrote:it's also quite possible that part of Carnymancy is making people stop and pay attention to you when they normally wouldn't
Yes, Parson doesn't stop running until the frame in which the background becomes swirling orange, the color of Jeftichew's jacket. I think it quite likely Parson is under the influence of a carnymancy spell, at a minimum one that stopped Parson's progress and encourages banter.
I like the idea that carnymancy gets people to make mistakes...to do what they normally wouldn't and couldn't see themselves doing. But that isn't necessary here. Look at how the action progresses.
1. Jojo starts shouting at Parson, who then notices Jojo chasing.
2. PG decides to try to just run for it, but it becomes pretty quickly clear that Jojo is catching up and will be within melee range before PG can leave the tunnel.
3. Jojo shouts out this line: "Yes, folks, see him run right into
what Fate has spun, and shun the one who could get it alllll undone!" This clearly implies the ability or inclination to end the Summon Warlord spell.
4. Duty be damned, Parson can't ignore someone suggesting they can send him back home, and besides that, he can't ignore the possibility of being attacked from behind. So, he wheels and brandishes his sword at his pursuer.
No spell or other magic is necessary. Maybe Jojo is lying about being able to end or cancel the spell, but that's not magic. The orange swirl panel is just an artistic nod to your standard 80's cheap animation action panel, like this one:
Casting a spell requires magic words. Casting a scroll requires opening the scroll and reading the magic words off of it. They aren't in a hallowed place, like the hippiemancer's glade, where certain magicks infuse the air, and Jojo doesn't appear to be using any magic item that would allow him to create a spell effect without speaking, such as suggestion dust or a staff.
Now, all that applies to everything we've seen up till now, but it is possible that Jeftichew is using Rhyme-o-mancy, which we haven't seen used yet, but could imagine looks a lot like what he's doing here. Still, I say there's nothing in what Parson does that isn't almost demanded by Jojo's actions alone, without any magic working on Parson.
Edit: MarbitChow posted before me on the anime point, but I'm leaving my comment whole because maybe the illustration helps.