Here&#x27;s a video (from Japan) about this phenomenon:<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=BGPGknpq3e0" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=BGPGknpq3e0</a><p>I wonder whether it was discovered independently, or if it has been communicated somehow. Or maybe they&#x27;ve &quot;always&quot; done this, except with horses before cars.