Scarlett Johansson got quite the scare when she stopped by The Ellen DeGeneres Show on Thursday. Scarlett opened up about her life as a new mom and what it was like filming Avengers: Age of Ultron while pregnant, but the conversation was interrupted when her costar Chris Evans snuck up behind her. Scarlett hilariously jumped and screamed in fear before embracing Chris. Watch the funny moment above, and see the old friends test their knowledge of each other. (Hint: Scarlett still gets distracted by Chris's good looks.)