I have probably heard or seen this reference hundreds (if not thousands) of times in my life, and it never fails to bring a smile to my face.
I know those guys are generally a bunch of liberal weenies, but I love their work!
Even as I read it, I can see John Cleese as “Tim” making motions with curved fingers near his mouth as he says it...grinning as I write this...:)
Funny-for years, I never saw the movie, but I had “The Album of The Sountrack of The Trailer of The Film of Monty Python and The Holy Grail”...I listened to it a lot when I was in the Navy back in the Seventies...then when I finally saw the movie years later, it was odd, because there were things on the album not in the film, and my mind kept trying to interject those things!