Honestly, Scarecrow should have known better than to activate the fight or flight responses of a group of Amity Parkers.
So in summary, the Casper High students came over for a tour of Gotham, fun right? Well, the Gothamites are about to look like they’ve seen ghosts with these hellions, and Ancients forbid if the GIW tracked these Liminal children into Gotham.
The fear gas canister drops and discharges. The field trip group explodes into action.
Dash and Kawn quickly overturns a table and use it as a shield as they charge the goons with the most firepower. The cheerleaders tossed each other into the air for aerial attacks. The nerds turned objects from a nearby Janitor closet into a surprisingly effective trebuchet with astounding speed. Valerie utilizes impressive martial arts skills.
Danny flits about the battlefield pilfering and disassembling weapons with a shocking degree of efficiency as Sam follows him around and bludgeon anyone who attempts to make a grab for him with a stand that had been holding up a rope barrier, and Tucker lays down cover fire by launching pencils out of a makeshift bow formed from a binder and rubber bands with a startling degree of accuracy.
Mr. Lancer flits around pulling kids out of the path of attacks they hadn't seen, stowing any injured behind cover, and giving foes solid thwack on the noggin when the opportunity arises. He actually ends up knocking out Scarecrow himself.
The statement "We're not trapped in here with you. You're trapped in here with us," is repeated several times by different people.
(Notice!! All the Casper High students has a form of super strength, also making it so that they are able to touch ghosts.

They join the ghost brawls every once in a while and has some wins.

Most of you, if not all, are liminal in some way.

Everyone knows that Danny is Phantom but has signed an NDA that says they aren't allowed to tell anyone who isn't a native Amity Parker who he is. Jazz is also an intern psychiatrist at Arkham Asylum.)