Filmmaker Jennifer Arnold goes on the road in search of the hairdo that’s short in front and long in back, a favorite of poor whites, weight lifters, country-music fans, soccer players, and lesbians. A cross section of working-class Americans wax euphoric over the mullet, a declaration of independence for them but an embarrassing affectation to others. This 2001 documentary is alternately sincere and tongue-in-cheek, which seems appropriate to the bifurcated look. 52 min.