10 Films You Didn't Realise Were Gigantic Successes

Any film that takes 20 years to shoot and is cut from hundreds of hours worth of home video footage, deserves to be seen by as many eyes as possible and thankfully this next entry attracted a decent amount of people into theatres around the world.

Tarnation was a documentary film produced by Jonathan Caouette, which told the the story of his relationship with his mentally ill mother.

Winning the Best Documentary Award from the National Society of Film Critics and earning praise for its appearance at Sundance in 2004, the filmmakers actually couldn't even afford the $30,000 to make a film print to show at Cannes and had to rely on art house distributor Wellspring to fund the flick.

This led to a rousing reception at Cannes and global distribution. However, what really makes this release so remarkable was the fact that the original footage was shot and produced - on iMovie - for just $218. Tarnation eventually went on to earn $1.2 million at the box office.

A film which definitely drummed up enough buzz to be remembered as a thoroughly important dive into the realities of poor mental health and how it can affect a family, isn't given enough praise for becoming one of the most critically/financially successful documentaries ever made.