Granted! Unfortunately, none of that matters, since you're locked in a room with no windows or doors.

I wish I were taller.

Granted! Unfortunately, that wish has to be the same wish as before. So, you have to wish for another wish. And so on. Forever. Never ending. Maybe you should've wished for a cat or something.

I wish for a cake.

[font=big caslon]Granted! Unfortunately for you, each time you try to take a bite or move it, it disappears and reappears in it's previous spot. Hope you put it in a nice place because you'll never be able to move it.

I wish I could transform into different animals at will.[/font]

Granted! But...you can never switch back. You can move between animals, but no one will ever know it's you.

I wish I could fly.

[font=big caslon]Granted, but once you get into the air you'll keep floating up. I hope you have a harness or something.

I wish I could cast spells with my mind.[/font]

Granted! Unfortunately, they're never the spells you mean to cast. Oops.

I wish I could live underground.

[font=big caslon]Granted! To bad you live forever and there's nothing there. People, animals, food, water, and no way out.

I wish that I could read minds.[/font]

Granted! You can only read the bad thoughts, though.

I wish I could star in a movie.

[font=big caslon]Granted! It's unfortunate that no one has seen or heard of the movies you star in. They might as well not exist.

I wish that I could be a famous scifi author.[/font]