Many were left scratching their heads when veteran actor Clint Eastwood took the stage at the Republican National Convention Thursday night, and proceeded to berate an empty chair. (Though I, for one, thought they showed wonderful chemistry.)

What many viewers failed to realize was that, for Eastwood, this was yet another chapter in a longstanding feud with chairs -- the most notable episode of which occurred in 2004, when a boxing stool maliciously attacked and crippled Clint’s ingénue, Hillary Swank, in the film "Million Dollar Baby." It was an experience, it now seems clear, he has never fully recovered from.

Watch the above video for a compilation of Eastwood’s most heated showdowns with chairs. Just make sure you’re not sitting down when you do … they could be coming for you next.

Video by Oliver Noble with assistance from Eva Hill