First line in Deliverance by Opeth:
"Floating on mist"
but i always hear:
"Choking on dicks"
Opeth also has lots of other classic quotes, there was a video circulating on youtube with some of the best, but i couldn't find it now.
Anyhow, some of them are:
"Leave the pee, it was meant for me"
"What would they care if i was gay? no-one would know, hoooomoooo"
"Deadly badgers laid my wreath" =D