When you are walking with an umbrella up, on a still day, do you ever just let go of it and let it drift along on it's own a bit? You have to catch it again fairly quickly of course, or it falls out of your hand, but not as quickly as you might think.
If you are walking home, let's say, the umbrella just keeps on heading home on its own, for half a second. If you lightly regrip it and arrest it's fall, then let it go again, it continues to sort of autonomously drift homeward. It feels very slightly as though the umbrella is just a pleasant, undemanding (yet useful) companion - who could be doing anything at that moment (shopping, snowboarding, on Facebook), but is happy to just be out for a walk with you.