http://www.metal4all.com/opeth-cover...orlando-video/

Hah! Opeth is a progressive metal band that is very highly regarded by critics and metalheads alike. Seen them live a couple of years ago at an arts festival and they were very very good. Anyway - this is hiarious. Clearly taking the piss - but the crowd seems to know the lyrics, between all the laughing, which is quite funny.