I'd read that Tesla designed in his mind's eye, the A/C electric motor which was thought to be impossible by others. Here's an article I found in a search[0].

Whenever I try, I only get the blobs and don't have great control of even the blobs: barely recognizable if at all. I have on rare occasion have moments of lucid dreaming where it starts as a regular vivid dream, but then I realize that I may be dreaming and have some control of myself or the scene. I could will myself to fly around, but not very high off the ground. Maybe the realism of the vision was forcing an unconscious (even within a dream?) safety measure.

[0] https://mindtasting.medium.com/the-mind-of-nikola-tesla-4305...