song accompanying himself by humming, whistling and playing many of the instruments he had used in his one-man band. With the technology available at the time, he added the additional images of himself by re-exposing the film multiple times to include 11 images of himself using custom-designed equipment that he had developed to ensure that the sound and images were synchronized during the re-recordings. The multiple re-exposures meant that an error on any of the dozen images would require starting from scratch. At the age of 92, in the year 2000, the National Film Preservation Board of the Library of Congress selected Multiple SIDosis for preservation as part of the National Film Registry, making it one of the small number of amateur films included, joining the unscripted Zapruder film of the John F. Kennedy assassination. Stephen Leggett of the National Film Preservation Board described the film as "technically quite adept and inventive, amusingly droll and quite mesmerizing to those who see it" and noted that it was chosen to "honor all the many terrific films produced by amateur ciné club filmmakers throughout the U.S. over the years". Personal Sid became a member of MENSA later in his life, after reading an article about it in the Reader's Digest, and remembering that an IQ test given to him in the 1940s for a job in the defense industry was the highest recorded. In addition to his films, Laverents wrote two books; His autobiography, The First 90 Years Are the Hardest and the novel Raging Waters about a devastating 1929 flood in Elba, Alabama. Worried that his health might prevent him from attending a party celebrating his 100th birthday, he prepared an apology video in advance, but was ultimately able to attend. Laverents lived in Bonita, California, and died at age 100 on May 6, 2009 in Chula Vista, California due to pneumonia. He was married four times; his first two marriages ended in divorce, and then he was widowed once. He was survived by his fourth wife, Charlotte, whom he married in 1991. Legacy Two videos on YouTube were made by artists who expressed their inspiration from "Multiple SIDosis" for their work. These include "chronic.robotosis" by Roger Pellegrini, and the video for the song "Never Alone" by Low Water. External links Sid N. Laverents Oral History, interview conducted by Ross Lipman of the UCLA Film & Television Archive on March 29,