Whenever I go to Whiterun and pass Pelagius farm there's a giant that was killed by the Companions, I helped them kill it when I first came to Whiterun back when I was still a level one character. His corpse just floats into the sky. Every month or so the corpse respawns and then sedately floats into the heavens. I keep thinking he's trying to return to some mystical, Laputa style floating island but keeps getting rejected.
I also find that certain dungeons and caves just won't let me enter at all if I have a companion with me. They just spit me out as if to say "nope, not gonna happen, sissy boy. Come back when you grow some balls and can go solo". Ridiculous thing is, most of them have next to nothing in them. Like, maybe a troll, or some wolves. Ingol barrow also does this, but all that was in there was some weird ghost Draugr (who was super tough btw) and these weird balls of light. Supposedly they're "sea ghosts" or something *shrugs*
There's also a mountain pass that's just south of these big Dwarven ruins, spawns some really weird battles whenever I go there. Like bandits attacking giants and mammoths with sabre cats mixed in. It seems to me that it spawns several "randomn encounters" in one go, everytime I go there. I mean, I can ride away down the road and come back a minute later and the battle just seems to grow larger and more randomn. Got a ton of loot after they died down, actually earned me quite a bit of gold. Thank the Gods I have a horse to carry my fat overencumbered ass XDD
