A Crossbreed between Shadowfax and Treebeard: You get a horse with leafy twigs for limbs that runs like the wind and then scolds himself for being hasty.
Or: a crossbreed between a Balrog and an Eagle: you get a Balrog with wings! [img]smilies/tongue.gif[/img]
<exasperated sighs from barrowdowners sick to death of this issue>

Galadriel and Sauron in the movie...

Frodo: If you ask it of me, I will give you the One Ring...
Galadron: Thanks bud!