Ever had a real honest to goodness panic attack? They come in different flavors.
Yesterday I had a really good one. 20 different distinct thoughts floating through my head. It was like being in the center of a tornado and seeing chaos swirling around you. Thousands of thoughts you can't focus on but roughly 20 you can track and occasionally you could focus on one of the 20 but could not reach it and could only hold the focus briefly before it zipped off spinning with the rest of the clutter.
The madness drives you to the bed where you pull the covers over your head and try to focus on a single thought. Calm is found in sleep but wakefulness unleashes the dragons. You come to with a start realizing that you've wasted potential productive time in hiding. The adreline rushes and the tornado swirls. A cyclic nightmare.