Abslutally normal. I often go into "my rages" where I have random thoughts of harming others. I get urges to stab people with a soldering iron, pimp slap people, face and ass punch people, and violate their anal cavity with random objects. However, I act upon my psychotic thoughts...
It's called your "id," the repressed, ignored, and oftentimes violent side of you that you imagine letting out from time to time. Sometimes, I get the urge to knock old ladies down stairways, and I am a very pacifistic person that would never be able to do something like that.
you've been desensetized to violence. Dont forget that you are only human. Regardless of what you think, you cant take that 250lb bodybuilder who might just be friends with the person you just punched. Stop watching so much TV.