"This Is Spinal Tap" is a 1984 mockumentary directed by Rob Reiner. The film follows a fictional British heavy metal band called Spinal Tap as they embark on a disastrous American tour. It humorously portrays the challenges and absurdities of the music industry, showcasing the band's eccentric members and their over-the-top antics. The film is known for its satirical take on rock culture and has become a cult classic. It features improvised dialogue and memorable scenes, such as the infamous "11" amplifier. "This Is Spinal Tap" has influenced many subsequent mockumentaries and remains a significant work in comedy and music history.