A Runner's "High"

According to Scientific America , "a Runner's High is a feeling of euphoria coupled with reduced anxiety and a lessened ability to feel pain."
I'm not the biggest runner around. When I do cardio, i'm usually only on it for 30 minutes in order to put a "check in the box" and call it a day. In other words, I don't care for it that much but I have experienced a Runner's High and totally understand why some of you like to run that much.

What did it do to me?
I'm a pretty anxious person and that reduced anxiety, mentioned above, was definitely felt. It's almost like the clouds in my mind had gone and I could think clearly for the first time in a while. As a kid, I would get that feeling while playing soccer but never really paid attention to it.
The feeling started to fade roughly an hour after the workout. As I write these words, it's been roughly 8 hours since I was at the gym and only have distant memories of how it felt.
I remember feeling like that as a kid while I was playing soccer but I never really paid attention to it until today. As we get older, we get less and less of those euphoria moments because life doesn't really push us to move all that much.
But I get it.

I "get" why some of you crazy folks are running for hours on end. You guys are chasing the feeling.