Released at a time when disco and punk were polarizing, dominating forces, Let There Be Rock sounded like the work of rock 'n' roll primitives locked away in their own world. While each AC/DC album seemed to ramp up the intensity and menace, this 1977 effort seemed almost brutal in its attack. Riffs were faster and laced with fuzz on the "Route 66"-esque "Bad Boy Boogie" and the salacious "Whole Lotta Rosie." While Angus Young's fretwork has never lacked energy, on the title track he practically sounds possessed. The band is pared-down and ferocious on Let There Be Rock.