Why the hell is it called a Panic Attack or Anxiety Attack if you don't have to be feeling panic or anxiety when you get it?

I just figured out today that I have suffered several of these over the past 10 months. I just called it: "Feeling really friggin' weird all of a sudden for no g-d reason!" You better believe I have some panic when it hits like: "Holy s*** [wife]! I have to pull the car over to the shoulder of the interstate because all of a sudden I feel like I was just possessed by a ghost!" (The first time it happened). The next time: "Oh f***! Not when I'm driving again! I'm gonna end up killing someone!" I don't think that's the "panic" implied by the name, is it?

Most recent one is the best: Sitting in a movie theater about halfway through an enjoyable movie having popcorn and water then - "WHOOSH!" -that feeling just streams right into me without warning. My reaction: "Are you friggin' kidding me?! Here! Now! What hell for! I'm just sittin' here watching a pretty enjoyable movie having popcorn and water! For cripes sake I didn't even get drunk last night!" Wait ... let it pass ... still feel kind of weird for a while, finish movie and drive home.

I'd always figured that feeling was some kind of reaction to the ADHD stim meds. It feels a kind of like a stim med crash multiplied by about 100. But maybe some of my "stim med crashes have been a limited symptom attack.

I love asking questions like this here: Is this a normal Panic Attack feeling? Heh, Heh - "normal" - riiiiiiiiight.