23. Michael Moore Booed (2003)
While accepting the Oscar for Bowling for Columbine, Michael Moore raged against the Iraq War from the stage. Booing erupted throughout the hall, countered by cheers, creating a chaotic back-and-forth that drowned out parts of his speech.
The political rant turned the acceptance into a divisive spectacle and one of the most uncomfortable audience reactions in Oscars history.
