He is the only non-player to have been invested into Rugby's Hall of Fame and there is good reason for that.
Of course he was famous anytime a Scot performed a particularly spectacular play that looked like leading to a certain win but saying:
"They'll be dancing in the streets of [insert appropriate home town of player] tonight."
No doubt tonight they'll be mourning on the streets of Hawick, one of the homes of Rugby in the Scottish Borders, tonight for a true gentleman, scholar, legend an authority of the game.
Bill McLaren 1923-2010
UPDATE: The following is a compilation of some of the phrases he would come up with on the hoof.
Further Update: Here is a Keith Wilson poem as featured on BBC TV about the six nations, of course we only hear the voice of one commentator. Of course none other than the voice of Rugby.