This is such a fascinating aspect of the brain. It feels as if there is some kind of "latent/subconscious" thinking involved and the 'conscious' thought only rises to the surface when the trigger arises.

I've had a similar feelings of awe about our own brain during dreams at times. I could talk in a different language, come up with tunes I have never heard before, create visual art in my head etc.

The same extends to some of.my psychedelic trips. There could be a possible connection here.

Would love to see more BCI experiments on both fronts.