Now i know that dragons fall out of the sky when their health is low, but it usually only doesnt the same animation. This dragon however looked like he was just about to hover over the area and then breath fire down upon me but just as i got my ward up he just fell out of the sky and belly flopped on the ground (not sliding across the ground like they usually do)

I'd like to think this is a new animation that Bethesda have added into the game, does anyone know if thats true and who else has had this happen to them?

I have seen them belly flop before when just landing. They are not the most graceful of creatures on the ground.