18 References to the Original Mary Poppins in Mary Poppins Returns You Might Have Missed

While the kids are shocked to see a woman flying from the sky, Jack (Lin-Manuel Miranda) is completely unfazed. It seems he learned of Mary Poppins's magical abilities from a chimney sweep he used to work alongside when he was a boy. Yep, Jack actually knows Bert. There's a reference to the memorable character (played by Dick Van Dyke) as Mary Poppins asks Jack how he's doing and he replies that he's traveling the world.