It's no secret that the menswear of the late 1960s and early 1970s was, frankly, awful. (All those synthetics and strange patterns—tsk tsk.) But it's easy to forget just how abysmal the hairstyles were, too. Who knew there were so many variations on the mullet?

This video montage (via Laughing Squid) will allow you to fully appreciate the badness. Where did these photos come from? What were these men thinking? Why are we listening to the Kaiser Chiefs? History's mysteries! Let's hope we get to see a few more of these on the final season of Mad Men—surely groovy Harry Crane could use yet another ill-advised cut.