Be careful what you wish for...

[Hookbill the Goomba]

I wish that when Gimli blew the horn of Helm Hammerhand, that the sound would have been the infamous BROWN note.

Your wish is granted. The brown note resounds around Helms Deep and all through Rohan! However, as all should know, the Brown note is one of the twelve forbidden notes and when ever anyone hears it, their ears bleed until their brains ooze out of their faces. So all the Orcs are defeated. But so are all the Men of Rohan, including Aragorn Legolas and Gimli. Minas Tirith falls. An Orc wears Denethor's coat.

I wish Bilbo and Gollum had become friends in the Misty Mountains.