I'm going to make my brother hurt himself after a heated argument
What about your brother makes you want to do something so terrible to him?
My brother has been such a prick lately and I hate him
It's normal for family, especially siblings to fight. But at the end of the day it's your brother and you should try and be civil with him. It's not right to cause harm to your brother when he probably didn't mean to make you mad in the first place.
I'm going to think about it, but I doubt that I'll do it.
Good, it can be healthy to think about things that make you feel better as long as you don't put it into practice. You need to realize that family is important and actually hurting your brother is a terrible thing to do.