The film, set in the Power Miner's universe, uses the band Fight Like Apes' song "Knucklehead" to drive the plot. Some great animation plus who can't help but love those rock monster minifigures.
But wait there's more...
If you want some more PM rock monster goodness, be sure to follow Christopher Doyle's Brick House strip on Reasonably Clever. The evil hairpiece has absconded with Whiskey's second head that he obtained from "The Creator" while in the meta-verse. After escaping into the tunnels below Brick House, the hairpiece has stumbled upon a tribe of rock monsters who communicate only by singing classic rock songs and show tunes. Ya got all that?!