Yep, done it before. My Nord Warrior has even shot a Hawk out of mid air in Solitude with a Daedric Bow, even though he doesn't have Eagle Eye or Steady Hand perks, and without the use of Slow Time shout.
This really isn't a boast, the hit zone for taking down the hawk is large, you just need to fire a arrow/spell vaguely in the area it is.
Shock magic is brilliant for hitting dragons, it has no delay so will always hit if you aim right.
Some time ago, jumped off Autumnwatch Tower, and landed on the back of the dragon there, in mid-flight. It was sweet, Lydia was shooting him with arrows, I was riding him (for a short while), pounding him with a blade, and he went nuts. When he shook me off, I took considerable damage, but I was laughing so hard it didn't matter. He died shortly thereafter to my sword, with this really irritated look on his face. So we both hit him in the air, Lydia with arrows, me with a pair of boots.
This didn't happen.