When i get angry i want to kill sombody,is it normal?

OH EM GEE I DO THAT!! my friends think I'm crazy haha especially when the teacher just ignores you or someone is just sooooo annoying your like ok I'm gonna pull your fingers out one at a time them I'm gonna crush...... Yeah you get my drift, and yeah when you think about doing it your like wow that's actually a good idea and then your all happy and stuff hahaha!!!! But obviously I could never do that in real life, there'd be too much blood :@