When I headbang- and we do headbang since as far back as we remember- my hair, shaking like clumps of phantom pom-poms, has its fun, evading a spotty survivor's guilt, making good use of training and conditioning under diverse climates. But it still chafes against a comb, which is understandable. I don't relish being grabbed by my throat although I have been, but very safely, in the good humor of a modest Tropicana-