If we're judging by intentional hilarity: Call me insane or a plebian if you wish, but I actually found Son in Law hilarious. I don't know, maybe it's the theme of a wacky ENFP stuck in a backwoods hick town that appealed to me.
If we're judging by unintentional hilarity: Bio-Dome, no contest. That movie was godawful, and so funny because of it.
If we're judging by unintentional hilarity: Bio-Dome, no contest. That movie was godawful, and so funny because of it.