Well, Ellie Kemper is the actual bomb. When she appeared on Ellen earlier this week, she gave that dancing host a run for her money with a series of sneak dance attacks as part of the show’s “Dance Dare” segment. She grooved on the set of The Office; she grooved behind Ellen Degeneres’ mom. She grooved with a mouse; she grooved in a house. She grooved in a box; she grooved on a fox. Minus the last four things.