i felt that Larry Holmes dug rather deep in severeal of his fights, he always showed his toughness when he was behind, with his amazing chin, and amazing stamina, and will to win. He looked down and out against Shavers and against Snipes.

But if 1 comes to mind it is:

Darryl Doin Damage Wilson coming from behind here against Courage Tschabalala:

www.youtube.com/watch?v=Fq1Zke0XhVQ