I'm going to stick a sewing needle in my teacher's eye.
That is so shocking, Why would you need to be that drastic and stick a needle in her eye?
I have always just really wanted to do this to see what happens, plus I hate her anyway.
This is a very sadistic, dangerous and very harmful thing to do to your teacher. It doesn't matter how much you might hate your teacher, she does not deserve to get blinded for the rest of her life.
What's wrong with a little after school fun?
Putting a needle in your teacher's eye is not after school fun. It is a cruel and harmful thing to do to a person and it's wrong. Find something else to learn about and leave your teacher alone.