It's called too much television!
"It's called too much television!"
No, it isn't. Do normal children get out of bed in the middle of night and go the living room and sit on the couch cross-legged rocking forward and back for hours? And I wasn't watching TV. We only had a B&W TV when I was a child and the two available english language stations had little programming of interest to a child. That's just one little example of ADHD behaviour, one that I exhibited as a young child.
Now, whether it is really a disorder or disability or whatever is highly debatable. I personally believe it is just part of the spectrum of normal human psychology. It has its good side and its bad side. It's not a great benefit in doing software QA test engineering, like I do, but I manage. Fortuantely my innate intelligence makes up somewhat for my lack of organization and focus.