Ray Leonard told me this story.
Ray, Juanita (his wife at the time) and Ray Jr were leaving the weigh-in. Duran suddenly stepped out from behind one of those big velvet drapes popular in Vegas hotels at the time. He had been taking a pee. Still exposed, he made a kissing motion at Juanita. Ray went nuts and charged at him, only to be intercepted by several shocked security guys from the hotel. As they tried to keep Leonard and Duran apart, Duran (who didn't speak English very well and had obviously been coached) said to Ray, "When I'm done -----you in the ring I'm going to -----your pretty wife and ---- your little boy."
Ray went crazy and tried to fight off the security guys to get to him. Duran laughed. (Try to picture the poor security guys, this was no publicity stunt, there weren't any reporters near by)
Ray couldn't sleep that night, he wanted to kill Duran. He couldn't believe what happened, how Duran insulted his wife and child. When they fought that next night anger still permeated every pore in Ray's body. So he stood toe to toe with Duran. And lost. It wasn't until the middle of the next afternoon when he realized what had happened. Ray told me he actually slapped his own forehead and said aloud, "Holy -----, he played me like a fish." Ray had never planned to fight toe to toe, he was going to box him
A rematch was part of the fight contract. It would take place eight or nine months later. But Ray knew Duran often ballooned upwards of 180 pounds after fights. So Ray's people contacted Duran's people and said they give him X amount of extra dollars if they moved the fight up. They took the deal. This meant Duran would have to stop eating and hurry his normal training time
Ray told me it taught him a valuable lesson about getting into a fighter's head. He had thought he was immune to it. Until that incident at the weigh in. In that second fight - the showboating that Ray did, the shuffle, the bolo punch, were meant to make Duran lose his temper, which is death for a fighter. But Duran didn't lose his temper, instead, it embarrassed him and deflated his will.