About the film
Who the #$&% Is Jackson Pollock? is a 2006 documentary following Teri Horton, a 73-year-old former long-haul truck driver from California, who purchased a painting from a thrift shop for $5, only to find out later that it may be a Jackson Pollock painting. She had no clue at the time who Jackson Pollock was, hence the name of the film.
From the film's Wikipedia article (CC BY-SA 4.0).