I'm going to knock over a girl's smoothie in front of the whole class and not apologize
Why would you want to treat her that meanly?
I hate her and I just wanted to do something mean to her
Hate seems to control your mind and actions, how sad for that.  Just go on with your day and pay attention to things you love. This type of hate doesn't solve anything, it makes things look bad for all including you after all is said and done.
You're just going to look stupid when you get knocked over in front of like 400 people.
I think that you should try to release the hate in your heart. I think that it is sad that so much of your day revolves around hatred. It should be a goal not to hate anyone.