Shia LaBeouf's odd behaviour continued on Tuesday (11Feb14) as he launched a bizarre art installation in Los Angeles.

Just days after the 27 year old wore a paper bag over his head with the words 'I am not famous anymore' scrawled across the front at the Berlin International Film Festival premiere of his new film Nymphomaniac, the actor was back in Hollywood for the opening of a public performance art piece, titled #IAmSorry.

Fans and the curious visiting the exhibition at 7354 Beverly Boulevard were treated to a press conference-type encounter with a person, believed to be LaBeouf himself, who sat in front of them with the bag he wore in Berlin on his head.

LaBeouf's questionable antics began late last year (13) after he hired a skywriter to scrawl an apology to writer/animator Daniel Clowes following claims his short film Howard Cantour plagiarised a graphic novel.

He then announced his retirement, hired a second skywriter to spell out a message to his critics in the skies about Hollywood and engaged in a war of words with Jim Carrey after the funnyman poked fun at LaBeouf at the Golden Globe Awards.

The actor was also involved in a pub brawl in London last month (Jan14) and he stunned reporters at the Berlin International Film Festival in Germany on Sunday (09Feb14) by walking out of a press conference after answering only one question.