A class taught by American Ballet Theatre principal David Hallberg sounds like a dream come true. And after watching him give a quick lesson to a video producer at Business Insider, we're going to need Hallberg to start a regular class, ASAP. While promoting his new memoir, A Body of Work: Dancing to the Edge and Back, Hallberg taught Business Insider's Kevin Reilly some essential ballet steps. But while Reilly begins by confessing to Hallberg that he's in need of some new dance moves when he's going to a wedding or a club, the steps he learns aren't quite what the average viewer would expect to see. As a bunhead though, the balancés and changements are exactly what we find ourselves wanting to do at parties.