Paranoid was released by Black Sabbath in 1970 as the title track of their second album, and it became one of the band's defining songs. Built around Tony Iommi's driving guitar riff, the track helped shape the sound of early heavy metal and remains a staple of classic rock radio. Decades later, its opening seconds are widely recognised even by people who have never heard the full album, which is why short clips circulate in edits, reaction videos and sports highlights. The riff's urgency makes it a shorthand for tension, rebellion and dramatic momentum.