The only possession he took with him when he fled communist Hungary in the 70's was his collection of Frank Zappa records. Csupo credits Zappa with helping him learn English. Csupo was also a crew member in the early seasons of The Simpsons, whose creator, Matt Groening, is also a huge fan of Zappa. Some of Zappa's music has been used in Csupo's show Duckman (of which Dweezil Zappa was a cast member).