Former Microsoft employee Karen X Cheng quit the software maker over a year ago, with a farewell resignation video based on Don McLean's American Pie. During her year away from developing Microsoft's Office software, Cheng has learned to dance. She's detailed her daily progress and now says people assume she's been dancing for years. Cheng's YouTube video has gone viral and amassed nearly two million views in just a few days. "This isn't a story about dancing, though. It's about having a dream and not knowing how to get there — but starting anyway," says Cheng. It brings a whole new meaning to Office 365.