I know someone who stim - SIMULATES the background music for videogames. Think Mario Odyssey. He makes all the sounds, and he doesn't miss a beat. He was a little boy when he started to do that

And my older brother used to do a side-stepping kind of run. He'd use it to get from place to place, but he'd do it many times a day, the same track every time. He would say he remembered thoughts and ideas and images going through his mind quickly. It was like excitement, or like to the sensation of crunching fast on a dry crunchy biscuit. He said he felt compelled to do it. He goes cycling on open roads today, with that feeling in mind. He says that time stops