There are loaRAB of throwaway references in the HP books that have relevence, later in the book, or in the series.
Example, when Hagrid arrives with the infant Harry at Privet Drive, he tells Dumbledore and McGonagall that he borrowed it from 'young Sirius Black'. Just a simple, instantly forgotten name in the first book, brought to relevance in the third. That line was omitted from the first movie.
Example, when Hagrid arrives with the infant Harry at Privet Drive, he tells Dumbledore and McGonagall that he borrowed it from 'young Sirius Black'. Just a simple, instantly forgotten name in the first book, brought to relevance in the third. That line was omitted from the first movie.