Khan learned more in those 54 seconds than he did in any of his previous "fights" (use that term loosely). There is no reason why he can't come back though, he's only 21 after all. David Haye was labeled a bum when he got sparked out by Carl Thompson in 2004 but look how he's bounced back. Rude awakening for Khan today but he's still a talented kid & if he still has the hunger I think he can still go all the way. Give him credit for standing up & acknowledging it's "back to the drawing board"