This movie has, hands-down, some of the funniest scenes in comedy history.  The Black Knight, the wedding in the swamp, the Killer Rabbit, the Knights  Who Say, "Ni!"...too many priceless moments to count, all of  which make MONTY PYTHON AND THE HOLY GRAIL a comedy classic.  So why the  four-star review?  Because, unfortunately, for every inspired moment  there's a dull one, a lame stab at humor that doesn't pay off.  First-time  audiences might be laughing too hard to notice, but repeat viewings just  don't hold up--quite frankly, this movie is downright boring in some  places.  Feel free to watch it with a big group of friends (the opening  credits alone will bring down the house), but don't expect an unbroken  stream of laughter.  I'm still giving it a strong recommendation because  the best sequences in this movie are so damn hilarious that they're well  worth enduring the flaws.