"A bobblehead doll? Who needs that?" ...uhh. Kay. This is a sketch of DLM, made to demonstrate the principle of "Headbanger Syndrome". Or "Bobblehead Syndrome", whichever you prefer. I don't usually do this when I'm wearing headphones, but I ALWAYS do it in the car. Hell, sometimes I do it when I'm not listening to anything at all, and I don't even listen to so-called "headbanger" music. Yiiee.