By the end of that post, I have no clue where Corban/Ishtalle is... no clue where or in what angles they traveled, because I didn't know where they were facing before being pushed backwards, or if backwards would've meant deeper in to the earth. Irrigation is usually on the surface of dirt, but he was underground, so I'm a bit confused about that.

Also, given the nature of the beam, it's gravity locked in to a certain direction up close. Since its width is greater than a sword's edge, I'm not sure if its course would be completely bent in to a V shape, as opposed to the dis-junction protecting Ishtalle from destruction, whilst two separately smaller beams on either side of the sword continued their original path.