I am the danger

Listen here, buttercup. This ain't rocket science. Walter White, that's the dude who says this, is basically saying he's not someone to be messed with. He's the one who knocks. You feel me? It's like saying, "I'm the boss, don't cross me." And judging by your question, you probably need to take a class in basic life skills, you cotton-headed ninny muggins!