Frank Sassano has appeared on The Rock Cave so many times that Mark had to legally register him as a co-host just to keep the insurance valid. A man of impeccable taste spanning REM, The Cars, Meat Loaf, and ELP, Frank also launched not one but multiple "Pirate Radio Takeovers," which is basically a slow-motion coup dressed up as a podcast. Cave Nation, keep an eye on this one, he's 15 episodes deep and clearly coming for the keys to the cave.