Edit: Title should be Swimming, of course (why can't we edit titles?)

So I stole a horse at the Whiterun stables to get to Riverwood faster. I go to the Sleeping Giant Inn. Who follows me in? A Whiterun guard, only....he's floating...in mid air! More precisely, he's treading water as if he were in a lake or something. I tell him to bugger off because I'm Thane, see? He says okay and swims away! I follow him out the door and there he is, just merrily "swimming" along back to Whiterun in mid air.

I was like WTF?

are you on Pc, if yes press him and do resurrect might work
but it was a pretty nice story made me