Now, I've noticed that, too. When I was doing the quest for Mehrunes' Razor, I used Unrelenting Force on the Dremora's that spawned. One flew off the edge of the place I was fighting them and the other didn't. I killed the second one and found the third one stuck in a ravine. I tried shooting down at him, but, for some reason, the killcam kept playing and my arrow would bounce off of the edge, even if it was nowhere near it XD

Also, hi, Michellin :3