Yesterday I saw a mammoth go flying around a bit in the volcanic tundra region. It didn't go all the way up in the sky, but it was flying around in circles before landing on the ground. Surprising that it didn't die.

Don't know much about followers and their horses flying up in the sky, though. If it hasn't been fixed by an official patch, then they should probably do so in a future patch, since it sounds rather annoying.
We also really need horse armor in DLC or a patch, too. Seriously, horses just die too easily as it is, and it's annoying to have to go to the nearest city stable (even though you can just fast travel there) to shell out another 1000 gold (which I may not always have depending on what I've been up to in-game) for another so that it isn't such a chore to travel. I also find it a LOT easier to fight ice wraiths using mounted combat for some reason. It could be because it seems a little easier to evade their more damaging ice attacks due to increased speed and visibility of where the ice wraiths are. Though I have a hunch that they are NEVER doing horse armor again because of that certain DLC for Oblivion.
