Raising Hell marked an important and significant new era for the group. Leaving producer Larry Smith for up-and-coming sonic innovator Rick Rubin (still co-produced by Run's brother Russell Simmons), they began to fully transition not only their own sound, but the sound of the entire genre. Less live playing - with some exceptions - and a slicker, tighter sonic attack. Musical aesthetics aside, though, at their core they stayed true to the essence of hip-hop: two turntables and a microphone, or two. It's impossible to talk about the album without its worldwide smash, "Walk This Way," which hit #4 on the Billboard pop charts and saw the group digging in the rock crates to summon Aerosmith in the flesh, combining Steven Tyler's and Joe Perry's musicianship with the group's own take on the '70s classic. The songs video cemented Run-DMC as legit MTV idols, and both groups rode its wave to new heights.