Bob Hoskins, who played Mario in the sometimes-infamous Super Mario Bros: The Movie, has spoken out about the project fourteen years later in an interview with The Guardian.  And he doesn't have anything positive to say.

"The worst thing I ever did? Super Mario Brothers. It was a ****in' nightmare. The whole experience was a nightmare. It had a husband-and-wife team directing, whose arrogance had been mistaken for talent. After so many weeks their own agent told them to get off the set! ****in' nightmare. ****in' idiots."

Incidentally, the directors, Annabel Jankel and Rocky Morton, haven't directed a film since.  Though the film initially received a lukewarm reception by critics in part due to their lack of video game understanding, it has become a popular target of derision by gamers due to the liberties taken with the story.  Now we see what the starring actor really thought about the whole deal, and a good reason why there was never a sequel despite the cliffhanger ending.

Link: The Guardian (Warning: Hoskins has a potty-mouth)