User blog comment:Gary299/High School DxD BorN episode 4 review/@comment-25537445-20150426081036/@comment-26209278-20150426094730

I think it's because they saw Issei's pieces only, instead of his body, and they weren't fighting at the time, so no anger release.

I'm sure if they do animate it, it will hit you so far in the feels you'll be rocking yourself to sleep until the next episode...