One of my little brothers had a "running" problem from a young age. He ran from school, home, etc. (my parents promptly made sure he couldn't run from home again, and he didn't succeed after that first time. And we got him within minutes, before he rounded the corner) Anyway, it's my understanding that when he struggled at school with understanding something, or felt ashamed, he would bolt. It was really scary. He's neurotypical, but there were a few scary years of this. I just thought I'd share a personal story.