The song "Iron Curtain" by Spy Vs Spy's 1982 Demo From Four Fresh Lemons Sessions, seems to be about the act of defying authority and breaking free from oppressive systems. The lyrics "I jumped over the wall behind the iron curtain" suggest the idea of escaping from a restrictive and controlling environment. The repeated lines "It's just [?] nature" could be interpreted as a statement about human instinct and the innate desire for freedom. The song may communicate a longing for liberation and the struggle against oppressive forces. Overall, "Iron Curtain" seems to convey a message of defiance and the pursuit of freedom.