Elon&#x27;s whole gravity explanation is essentially a textual version of this excellent video&#x2F;demonstration: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=MTY1Kje0yLg" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=MTY1Kje0yLg</a> (19 million views). Highly recommended, very memorable.