I’ve grown weirdly fascinated with the YouTube channel of a young woman named Lily Hevesh — also known by the handle Hevesh5 — lately. I’m not the only one; she’s been building up notoriety as an expert domino tumbler. If you’ve heard of her at all, you’ve almost certainly seen her “Triple Spiral” video, which went viral last month. The video shows an amazing construction of 15,000 multicolored dominoes, which Hevesh built over 25 hours. It takes less than two and a half minutes for it to collapse.