YOU’VE PROBABLY NEVER heard of Siren, and “nor should you have,” admits their drummer, Ed Aborn. Yet these largely forgotten 80s heavy metallers from Florida are the subjects of a new must-see documentary, I’m Too Old For This Shit: A Heavy Metal Fairy Tale following the group of now 50-something reunited bandmates, as they give their childhood dream one more shot, almost three decades after they first broke up.