Zac Efron has revealed that Nicole Kidman`s sex appeal left him petrified on the set of his new movie The Paperboy. The 24-year-old star admits he was looking for a role that had depth and risk, which he found in abundance in Lee Daniels` steamy new film. But there was one explicit scene that left him stunned – as co-star John Cusack`s character is so turned on by Kidman`s Charlotte Bless he masturbates into his underwear as Efron`s Jack Jansen watches. The young star told Black Book magazine that the shoot was very intense. “That was the first day of filming and Nicole just completely went for it. She was telling everyone, ‘I’m bringing my A-game. What do you have?” Contactmusic quoted him as telling the publication. “I’ve never been so scared in my life, but that moment affirmed this movie was everything I set out to do,” he added.