A lot of “muscle memory” things strike me this way. For instance, I can pick up a guitar and my hands will know how to play a couple of pieces that I learned 45 years ago, even though I haven’t really done any playing since then. I couldn’t begin to tell you how those pieces are played. I just watch as my hands find the right frets and strings.
That’s just a particularly curious example; actually, most of my activity through the day unfolds the same way. Mundane things like my morning shave happen with next to no input from me (whoever that is).