I&#x27;d expect he&#x27;s just attached a string to a phone case, and whirled it. If there were any stability issue a teeny tail-vane on one end&#x2F;side of the phone would hold it in its orientation.<p>I keep looking at this and something is scratching at my mind about rotoscopes, time slicing and rolling shutters, and how this could be used for <i>something</i>, but I can&#x27;t quite put my finger on what.<p>Edit: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=EnrwrwMfNSs" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=EnrwrwMfNSs</a> is along the lines of where my thought was going. You could make 360 video with this method, potentially extract high resolution spatial information too.