This happened a while ago, so my memory on how it started is kind of fuzzy, but I don't forget the result. I was fighting some bandits outdoors, and I used either a paralyze poison, or ice form shout to disable one of them. It may have been both, which caused the glitch. But before I could kill the bandit, he fell through the ground and reappeared about 50ft away and 30ft in the air convulsing violently, then a second or two later fell to the ground and died. I couldn't loot the body.