When you cast it on a Dragon skeleton corpse it goes flying like it weighs a pound?

Most spells that cause reanimation will move any corpse in the game.

It'll move the corpse a little, but a Dragon corpse goes flying like a couple hundred feet.

Dragon bones are made from a light weight carbon, of course they fly off.

Someone mentioned in a thread that they thought dragon corpse were too light for their size. However, the more I think about it, Dragons should be light, their bones should be light like a birds, as in not dense.

So, this effect from the spell makes sense, Lore wise.