"Um..."
"We both know why you've come here today. There's no shame in admitting it. You want to stop thinking for a while. Not forever--you don't want to turn that pretty brain off, you simply want to pause it for a little bit. But you can't do that all by yourself, at least not yet. You need someone to help you, to teach you how to stop thinking and let yourself rest in mindless bliss for a little while. And that's why you came to me.
"Now, they used to teach people to still their minds by repeating a mantra--a word or a phrase that you could repeat over and over and over again until it was the only thing you were able to think about. Your conscious mind--the part of you that thinks in words, that narrates your train of thought and makes decisions--would be filled, completely and totally, with that mantra, until only your subconscious mind was able to listen and react. Your subconscious mind absorbed whatever it was told, but the part of you that thought critically was only thinking of the mantra.
"I know. It sounds so wonderful already, doesn't it?
"Now traditionally, the mantra that people used to still their minds when meditating was the word 'Om'. But that word has a lot of deep and sacred meaning, and we're looking to stop your mind today mostly because...well, because it feels so nice to stop thinking and let someone else take charge for a little while. It's alright to admit that. So we're going to find a different mantra, one that's a little more appropriate for the fun we're having together. Let's choose a different word. Let's choose 'um'.
"I know it sounds silly at first, but when you think about it, 'um' is a very powerful thought-stopping word. You've probably had plenty of times when you were in the middle of a train of thought, or perhaps even just trying to start one up, and your brain simply...stopped. That story you constantly tell yourself in your head, a narrative of your thoughts and decisions and actions as you take them, just melted away into nothing. And all that was left was a single word, one you maybe even said out loud. 'Um...'
"And you've always thought that you said 'um...' simply because you didn't have anything else to say, but...what if it was the other way around? What if every time that 'um' slipped into your head, it broke up your train of thought and left only itself for you to think? What if that simple, silly little word popped every thought in your mind like they were tiny soap bubbles every time you said it, every time you thought it, until all that you could think was 'Um...'
"That would make it a very powerful mantra, wouldn't it? Before you respond, before you even think to respond, I want you to try something. Just try thinking to yourself, 'Um...' Imagine yourself in that moment, having nothing to say, nothing even to think, and trying to spark an idea in your head. But all that comes to you is one word. 'Um.' Try saying it to yourself, and feel how it makes your head go so wonderfully blank for a moment.