Actor Clint Eastwood was the surprise guest speaker on the last day of the Republican National Convention in Tampa, Fla. on Thursday night. The icon delivered a bizarre, rambling speech where he pretended to have a conversation with an imaginary President Obama in an empty chair. Documentary filmmaker Michael Moore called the speech "crazy," while legendary film critic Roger Ebert tweeted, "Clint, my hero, is coming across as sad and pathetic. ... It's unworthy of him." Watch the speech here.