I once had the following experience as a kid: i learnt a skill (in that case, juggling), completely in my sleep. I clearly remember trying it in my dream, faili

I once had the following experience as a kid: i learnt a skill (in that case, juggling), completely in my sleep. I clearly remember trying it in my dream, failing, in what was pretty much a "dry-run" or a simulation, where maybe several hours of actual practice were emulated within a few minutes of dreaming. When I woke up, I try, and it worked, I had captured the actual coordination/reflexes necessary for it to work. I also solved several problems/issues on a few occasions but this experience was the most stunning because it resulted in getting an actual physical skill that since hasn't gone away.