Was in a fight with a giant, he took a swing at me and when I dodged, he hit his mammoth that was coming up behind me. He sent it flying like it was a baseball out of the park and I commenced trying to survive. I was, luckily, high enough level to kill the giant. This was at the camp by my hearthfire house Heljarchen Hall. When I went back there, it was to find the mammoth buried in the front 'yard', upside down, with only about half of the 4 legs sticking up like strange elephant leg tables! Too weird!! I was on xbox at that time, so there was no way to get a screenshot of it. After it appeared that it wasn't going away, and my character 'shouted' Unrelenting Force at it in frustration, it came partway out of the ground. It took quite a while, but eventually shouted it out and far away before the game mechanics finally made it disappear. THAT, both the buried mammoth and that the shout removed it, was the most bizarre thing I've seen in this game, never to be repeated for me, thankfully!