Be careful what you wish for...

[Boromir88]

I wish Gandalf was a Giant-sized Snow Cone.

I grant your wish, but you eat Gandalf the Giant-sized Snow Cone, which gives you an uncurable brainfreeze until which you have to embark on a long, dangerous, treacherous year's journey to Mount Doom where to get rid of the brainfreeze you need to jump in the lava.

I wish Mumakil could tight-rope walk.