An unruly dog is one that is not controlled, so a mind like an unruly dog would be one that is not controlled and is jumping around rapidly.
Context: His insides shook and his mind was bouncing rapidly from one thought to the next
Hypothesis: His insides shook and his mind was like an unruly dog jumping on springs to escape the fence.

Given this context, is the hypothesis true (Yes/No/I don't know)?