Terry Jones, the co-director of "Monty Python and the Holy Grail", once said that comedy is defined as two disparate forces coming together and colliding.  That definition may not fit into all varieties of comedy, but for the Monty Python crew and especially this movie it does.  Almost all the scenes in this movie are true masterpieces of this definition of comedy,  whether it is a medieval serf spouting off neo-Marxist thought, or the ancient enchanter named "Tim".  This film also contains the greatest `deus ex machina' ending in the history of cinema with police interrupting Arthur's last glorious charge.  On a personal note, the first time I saw this movie at about the age of 15 on PBS, I did not know what to think.  When the film ended with the camera being confiscated by the authorities, I said to my father: "What happened?"  My Dad responded "I guess they ran out of film...you know PBS."  So, for those of you who have not seen the movie, try to savor your reaction the first time you see a cow flying over a castle wall, or the attack on Castle Aaaaaaargh.  The DVD special features are well worth it too, with an insightful director's commentary and a trip with Jones and Palin touring the sites where the movie was filmed.