When I meet a friend of mine, with whom I had no correspondence for a very long time, we chit chat and catch up - one story thread leads to another, and another until it reaches some point that the topic that we discuss at that time had radically no connection to the one we initially started off with. I was bewildered of this procession, and had the accidental opportunity of encountering more than once.
Its just that when you are perfectly relaxed, your subconscious mind takes over the matter more as you've left your mind wander without any reigns. Just that you took some notes at that time, shows you when you "wake up" what you were thinking while you were relaxed - perfectly understandable if it makes absolutely no sense to you when your mind is back in the everyday chaos
I still blame the tree as this doesn't usually happen
I will say my handwriting differs greatly when i am writing for myself or someone else. My own notes contain abbreviations that most people don't use and are messy. I remember one time I was out sick and asked a coworker to check a post it on my desk with something i needed to tell him. I needed to be on the phone to decipher it because even the words he could read didn't make sense on their own.