The escalator was invented long before there was an electric motor capable of powering it. Elephants were used to power the demonstration models, but nobody wanted a basement filled with those things. They’re big, smelly, and expensive to feed. Plus, elephant poop. This made the escalator a really hard sell for the inventor, because building owners weren’t willing to pay so much for a heavy, ugly staircase. “One day, those steps will move!” the inventor would shout. People thought he was drunk. Or overdoing the medicinal cocaine and heroin. He rode the elephants home and sold them to the circus.