Fight Fire With Fire (da-ba-da-DA da-ba-da-DA da-ba-da-DA-ba DA-ba DA-ba!) or the last half of One (da-ba-da da-ba-da DAAAA da-ba-da da-ba-da DAAAA da-ba-da da-ba-da DAAAA da-ba-da da-ba-da DAAAA DAAAA!) Hey doing that IS fuin.
Almost everything on the Blackwater Park song by Opeth, especially the 5:13 one and that... erh... mixed with acoustic guitars (after "taunting their bereavement"). The acoustic part of Demon of the Fall (and the chorus too). What else? Oh, yeah, Serenity Painted Death.
Hm... the intro of Born in a Mourning Hall by Blind Guardian.