Making others happy

I was leaving a film at the Carlton with a friend.  Two teenage girls were admiring the lobby mural as we, deep in conversation about the film, passed them, .  One asked my friend to take a photo of them in front of the mural.  My friend did take one picture and checked with the girl if it was exactly what she wanted.  The girl saw a resemblance of a character in the mural to Harry Potter.  She requested another photo.  She and her friend posed beside this painted character as if each was holding Harry Potter's hand.  The image worked out well.  The girls took the camera back, admiring the trick photography and my friend smiled at her accomplishment and off we went for tea.