Deliberate mistake: In the final race of the film, Seabiscuit performs a flying lead change at the gallop while crossing the finish line, in the famous shot taken underneath his neck. Horses normally only switch their leads around turns while racing; it's something done to relieve pressure on the leading foot. From taking the shot over and over again, the horse playing Seabiscuit was probably tired out and a little tender and began to perform lead changes in other places in an attempt to be more comfortable.
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Seabiscuit (2003)
1 deliberate mistake
Directed by: Gary Ross
Starring: Jeff Bridges, Elizabeth Banks, Chris Cooper, Tobey Maguire, David McCullough, Paul Vincent O'Connor
Factual error: Many of the main characters are using modern-day binoculars (black, plastic) throughout the entire movie.
Trivia: The saddle worn by Seabiscuit for some of his races is, in fact, the same saddle worn by Phar Lap, who was Australia's, if not the world's, greatest racehorse ever. Billy Elliot, who rode Phar Lap to victory in the Agua Caliente (the world's richest horserace at the time), gave the saddle to George Woolf after Phar Lap died (under mysterious circumstances) in California.
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Answer: Red asked for $10 because he needed to see a dentist, and Howard gave him $20.