I missed the Tribute part, who presented that bit?

George Clooney at the beginning was in on the joke but then during the night, it just went on and on. He knew that he wasn't going to win and so maybe that was part of it. During the red carpet, he said to a reporter, it's great to come to these events and then clap for Jeff Bridges when he wins but he said that nicely and not arrogant. So maybe it was just one of those nights.