I am in this space where my thoughts are not coalescing. I'll have some thought on a topic, but it won't fully form into anything I could write. I'm not confident I am properly experiencing the emotions needed to complete the thoughts. The inside of my head is just like your ceazy uncle rambling on about something that doesn't make any sense, until he forgets where he's at, but goes on anyway.

Runaway thoight train.

People use substances to experience this, I think.