One of the best things about kids is that they have no pre-conceived notions about certain things like music. They know nothing about the sub-culture of each genre and the politics within it. Their minds fall into the realm of "I may not know art, but I know what I like." In this case, art is brutal death metal. 

With the camera on (and sideways), this father gauges his son's reactions to different music, namely hip-hop and brutal death metal. The kid shakes his head "no" when hip-hop is played. When the brutal death metal comes on, he starts throwing his fists and opening up a one-kid pit in the living room. Stay brutal, kid! Now, if you can only get your dad to hold a camera correctly!