Panel 1: Bolin takes over the controls and accidentally sets off the camera. Korra's excited because this was obviously her idea and she's been wearing that huge smile since they sat down. Mako hangs back with a "can we get this over with?" expression, but secretly he thinks he's photogenic.
Panel 2: That is Bolin's impression of Mako. Mako, ever the good sport, sabotages Bolin's photo by doing the classic bunny ears because he is the type of dork who thinks that's funny. Korra just derps.
Panel 3: Korra pulls her den mother in and goes I WANT ONE WHERE WE ALL LOOK HUMAN SO BOLIN, NO IMPRESSIONS AND MAKO, NO FROWNING GODDAMMIT