For mindless entertainment I love to watch Monty Python and the Holy Grail.  There is no rhyme or reason to the movie, just a bunch of people doing stupid stuff and making it hilarious.  There's no need for neverending flatulance jokes (which is overplayed in almost every comedy of today) or a need to make fun of different races and cultures just to get a cheap laugh.  What it is is pure stupidity that makes you practically wet yourself when you watch it.  I couldn't tell you how many times I have watched this movie and laugh hysterically every time (as if it's the first time I'm seeing it and hearing the jokes).  This movie is perfect for those who feel like today's comedy's are overdone.  It's full of fresh comedy (which no one since has even tried to copy) and doesn't bore you with repetitiveness