For the mini-Stonehenge reference watch
This is Spinal Tap! 
If you don't have time for that, the run down is, Spinal Tap (Quasi-fictional 80's hair metal band) hires a prop artist to make a replica Stonehenge for their stage show, the manager didn't write the dimensions down correctly, they get a 20 inch Stonehenge model instead of the 20 foot tall one they wanted, midgets dance around mini model and hilarity ensues. It is a great movie and the perfect example of how a mock-umentary is suppose to work.
We need other people in the forums to post suggestions for hero units that correspond to a particular genre. I can name the
BIG ONES only because they are indelibly printed into pop culture, regardless of their metal nature. But I know little to nothing about Grindcore, Black metal and Death metal.