It never fails, regardless of where you live, there is someone that knows Holy Grail punch-lines verbatim.  The reason, of course, is because it's one of the funniest movies ever made and if you haven't purchased this  movie (or even seen Monty Python to begin with) I would whole-heartedly  recommend this movie.  Even from the start with the opening credit jokes,  this movie sets the standards for all-time creativity with comedy.  If you  don't find this movie funny, I am trully sorry for you, because you might  not have a sense of humor.