Egg Drop Soup's "Partying Alone" video turns a run-of-the-mill dance team audition on its head with a vision of female power from a mature woman. The panel is stunned when a gray-haired, red-lipsticked 80-something tosses aside her cane and lets loose, flipping her hair—and the bird.

Egg Drop Soup - Partying Alone (Official music video)

Take a second look at that head-banging grandma—she is none other than renowned dance researcher and anthropologist Judith Lynne Hanna. An affiliate research professor in anthropology at the University of Maryland, College Park, the author of numerous scholarly books and an expert witness in trials for exotic dancers, she has spent her career getting us to think about dance's relationship to society. Hanna, 82, said she hadn't performed since college when she got a call from a music video producer, who caught a video of her dancing with her 13-year-old grandson. The rockers of Egg Drop Soup loved her energy and flew her out to Los Angeles for a day-long video shoot. We spoke to Hanna about the experience.