Tom Cruise Jumps on Oprah's Couch (2005)

Tom Cruise’s couch-jumping on Oprah in 2005 remains the most iconic meltdown in interview history, setting a benchmark for inexplicable celebrity behavior. His manic declaration of love for Katie Holmes—complete with knee-dropping and fist-pumping—shifted public perception, costing him an estimated 20% of his domestic box office appeal, according to a 2006 Harris Poll.