Continuity mistake: In the first scene with De Niro's first wife as Pesci arrives, he is improvising as he argues with her and he says "you call those carrots" and she says "you ate them didn't you". He replies "I got no choice". But he had flipped over the table in the prior scene as she was serving the carrots so he never even tasted them.
Trivia: During the final match with Sugar Ray, a veteran ringside observer seated in the front row counted between fifty to sixty punches that Sugar Ray delivered to Jake LaMotta. Even after Jake was defeated, it was not all bitter: After the fight, the fans sang 'For he's a jolly good fellow' for him.Allister Cooper, 2011