I consistently have coworkers ask how my brain works as fast as it does and I just as consistently tell them that getting going and keeping going are just it's natural state, it's getting it to shut the fuck up that's the problem. I never even realized how much I mutter to myself until one of the security guards was orienting a new one to our Psych unit and I overheard "oh no she's always talking to herself that's normal." It's not internal stimuli it doesn't sound real to me it's just my own internal thoughts running like a little hamster on a wheel (did you know even wild hamsters will do that if you just put a wheel out in their natural habitat?)