So today I come out of some Orc stronghold ( I think it started with an N.) and am attacked by an Elder Dragon. No biggie. Quickly dispatched it and the carcass burned up as normal. What was weird was that I casted Ice Spike at the bones and it went flying! I followed it and it continued to do this. Once I got under it and shot it straight up in the air. My fun was only lost when it got stuck on the edge of a waterfall in the river

If it counts for everything I stripped the dragon of everything in its inventory. Has anyone else experienced this? Is this a known bug or have I discovered something completely new?
Also I play on PS3 if that matters.