Ok, here's one thing about De Leon that transformed me into a fan this last weekend: That crazy dance he was doing, waving his arms in front of himself and making a cross when the camera was on him...it looked like some kind of tribal dance. The cool part about the whole thing....De Leon claims he is possessed before fights by the spirit of his grandfather, who in fact is the one doing all the fighting. Once its over De Leon claims to not be able to recall most of what happens.
A member of a Mexican Indian tribe from the mountain country, Ponce De Leon does a private ritual before fights in which he believes the spirit of his great, great grandfather, an Indian warrior many generations ago in Mexico, enters his body. He has told friends privately that when he fights he often has no memory of what he did, believing it is his grandfather's warrior ways that are directing him.

Whatever the reason, Ponce De Leon certainly often doesn't listen to his trainers. Even before Penalosa exposed his flaws, the champion's handlers worked hard with him in the gym to improve his boxing skills. According to people who have watched him train regularly, the champion often is seen bobbing and weaving, slipping punches and boxing adroitly in sparring sessions but when he gets to the arena, something happens.

"He's a different guy in the gym," Gomez said. "He takes off the head gear and it all goes out the window. They've worked hard to change him into a more technically-sound fighter but they haven't been able to accomplish it. He is who he is. He's a warrior."
above was taken from a article by Ron Borges on HBO's boxing website.

I dont necessarily believe, but its cool as hell if you ask me....and imagine if your in the opposite corner watching. If all else its a wicked mind game.