Funny in 1983 and still hilarious today. Great soundtrack too. Some of my favorite scenes:
RIP, John "Stumpy" Pepys, Eric "Stumpy Joe" Childs and Peter "James" Bond.
Stonehenge:
Is based on a real incident from Black Sabbath's 1983 tour. Great interview with Ian Gillan, explaining the Stonehenge disaster.
And of course:
And then, years later, Metallica shamelessly steal Spinal Tap's artwork: