Trent Reznor, the frontman of Nine Inch Nails (NIN), has revealed that he felt intimidated by the likes of Ministry mastermind Al Jourgensen in the early '90s when he hung out with him in the studio working on new music. He also mentioned that he provided vocals for the band's cover of a Black Sabbath song. Despite these experiences, Reznor remained self-conscious throughout his life and felt more secure with himself than ever before. He credits this experience to his introversion and self-confidentness.