Physical feelings during panic

I can handle the physical feelings during panic. I now have proof of this.

Yesterday on the train, I experienced some high anxiety, maybe even some low panic.

I was stuck and had no way of getting away from it. So I went into survival mode. I had to make a plan. What was I going to do if the panic became unbearable? In what seemed to be hours, but in reality was only a few seconds, I thought about the physical feelings. I told myself that I can take it. Because I can. My workouts are stronger than panic in many cases. 

It was interesting. I was able to separate the physical feelings from the escape feelings. The physical feelings are fine. No problem with that. The emotional 'want to escape' feeling. That is the crux of my issue. 

But I had a breakthrough. I know that panic is there to save you when you're in actual danger. So if I'm not in danger, there is no reason to escape. As long as the physical stuff is manageable, panic goes away.