Jimmy Kimmel and Matt Damon's staged late-night feud

Matt Damon appeared on Jimmy Kimmel Live! to playfully mock the host following Kimmel's brief show cancellation and subsequent return. Damon, disguised as a mascot, interrupted Kimmel's show, joking about his own past "cancellations" and Kimmel's return to airwaves. The "feud" between Kimmel and Damon is a long-running, staged bit that has involved other celebrities and is a recurring segment on the show.