In every episode's opening sequence, three flashes of Otonashi are shown, the first two being from later in the episode. But the third one is always the same, with Otonashi shifting his gaze upwards and a blue sky behind him. Which episode and scene is this image taken from?

The third image of Otonashi in every episode's opening sequence:

http://i.ytimg.com/vi/-KfRq0Bpu5M/maxresdefault.jpg