Gervasi directed Anvil! The Story of Anvil, a documentary of the Canadian heavy metal band, Anvil, who had then been together for over 30 years. Gervasi first met Anvil on 21 September 1982, after a gig at The Marquee Club in London. He introduced himself to the band as "England's number one Anvil fan". He subsequently became a roadie for the band on their 1982, 1984 and 1985 tours, and was given the nickname "teabag" by the band. He reunited with Anvil after a break of 20 years, and started shooting a rockumentary about them in November 2005.