If "Kindred Spirits" wasn't the first time that Danny used his ghostly wail on or near Vlad, then Vlad must've been shook as fuck when he realized just how much power a little 14 year old cupcake like Danny could have.
I mean, do you think that only certain ghosts in the GZ have the ability to use that kind of power and actually control it? We all know that Danny is pretty powerful for a halfa, at least that's what we see, read, and write in hc's and fanfics. But do you think some ghosts, say Skulker or the Fright Knight, were fighting Danny one day or there was another invasion happening where they all worked together and Danny, at some point, got so fed up with it that he just ghostly wailed the fuck out of everything in his path and the ghosts were like, "Nope. Fuck that shit."
I mean, if something like that were to happen, the ghosts would finally start to understand the extent of Danny's powers and just how powerful he's getting and maybe lay off on him cuz they don't wanna get caught up in that sonic wave of destruction.
I really wish they went more in depth on Danny's ghostly wail because it'd be so awesome to see his progress in being able to control it. It's like when he first got his ghost powers: turning invisible/ intangible without meaning to, he has like no control over it so it just happens randomly. Imagine that Dash bullies him too hard on a bad day and Danny, like a couple days after TUE and having to deal with the aftermath of that, gets so annoyed and angry with Dash that he just screams in his face and unknowingly lets out a little bit of his wail. No sonic waves show since he's in human form, but his eyes flash green, his voice becomes echoey and the walls shake, picture frames falling and crashing to the ground, lockers opening. He doesn't realize what he's done until Sam and Tucker pull him away half yell and he sees everyone staring at him in horror because he just shook the whole fucking school like it was an earthquake, holy shit
