green room writing appeared in surfing magazines from the later 1960s , most famously with ( the foremost tube- rider in this era ) , jock sutherland making a religious connection by describing the inside of the tube as the popes living room.11 a similar juxtaposition of spiritual enlightenment with danger is described in aabergs article , invisible tracks , for surfer in 1970 : within a cavern of peace , a silent hissing , crystal shingles of green perfection , and youre safe , but locked far and deep within the hole of danger .