One day a little girl jumped trying to touch leaves on a tree. Another girl was wearing a red dress on that day, she was nearby but she didn't see the jump. A woman in orange sari was thinking about her own problems, she didn't pay any attention to the girl in the dress with flowers - she also missed her jump.
The whole situation happened only once ever and it will never happen exactly in the same way again.
And all that happened in a moment. that's why photography is so beautiful...