Seriously, I'm trying not to offend people, but Slipknot have a bad influence. Appearently, their lyrics and songs hype up kids so much that they commit suicide or kill people and basically: it's the devil's music.
You call screaming, making yourself hoarse and then playing a couple notes to it music? No, music was meant to be enlightening, not making your mind go all crazy then focusing your anger on something. Music might let you get away from it, but this kind just feeds your hatred.
Must I say one word? Columbine. The two kids who shot their own classmates listened to music like this and in this genre (eg. Marilyn Manson) and took out their rage on innocent people.
I'm just saying, find some other music. And if you actually like this, your choice.