The thorn in my side

This is Andrew, he is one of the kids that goes to my youth group. He is a cool kid, I pray for him, and he has had some very hard times, but he is able to still put a smile on his face. When we took these pictures, we where in an run downed house, I was takeing pictures of him and I see threw the veiw finder the look of terror on his face and he yells, "who is that?" Of course I turn so fast around and ready to run that it hurts. I look back at him and he is just sitting there laughing. Funny?