Racing thoughts doesn't always mean the thoughts are useful. In fact, I'm pretty sure it's often used to describe manic, "crazy" thinking. Thoughts are racing, but they aren't always logical steps from one to the next. Or even coherent. Like, I dunno, a train of thought that's ever-so-brilliant on how you'll break someone out of prison.

While I love mania and the amazingness of feeling like a god, it's not always (or often) that it's productive. Hypomania + stimulants seems a much better combo (esp as drugs can help kick off or stay sightly manic, though if taken sporadically, mania seems to result more often.)