For those who may not have heard yet, the great "Smokin'" Joe Frazier passed away tonight at the age of 67. Our tribute piece from earlier tonight will be accompanied by more on the former heavyweight champ during the rest of the week.

Here's a different sort of look back on the Ali vs Frazier feud.

On Christmas Day, 1978, an episode of "This Is Your Life" honored heavyweight champion Muhammd Ali, who three months prior had scored a rematch victory over Leon Spinks. The heavyweight champ was surprised on the show by an old friend and old enemy, none other than Joe Frazier.

The full episode is below, but click play and it will start just before Frazier's appearance. It's a feel-good moment watching them smile warmly and embrace. Watch Ali's eyes light up when he realizes it's Joe Frazier coming out.

There was, make no mistake, a great amount of animosity between Ali and Frazier over the years. But they were also friendly much of the time. It's important to remember that.

When news of Frazier's passing reached Ali last night, he had this to say:

"The world has lost a great Champion. I will always remember Joe with respect and admiration. My sympathy goes out to his family and loved ones."