Continuity mistake: When the bus is about to pull out of the station Ellie places her suitcase on the overhead rack, and in the next exterior shot we see the license plates at the front of the bus, then it cuts to a closeup and one of the plates has changed from "F8274" to "G8278." (00:08:40)Super Grover
Continuity mistake: While Ellie is standing behind the first bus (#204) when it's filling up on gas at the rest stop her suitcase is stolen, and as Peter starts chasing after the thief note all the license plate numbers including "173-909" and "G8271" at the back of the bus. Later, when Ellie and Peter are on the second bus (#217) as it drives into the muddy ditch, in the closeup we see license plate numbers "173-909" and "G8271" (and more) which are the same as the first bus they were on. (00:08:40 - 00:46:40)Super Grover
Trivia: "It Happened One Night" was the first film to win all five major Academy Awards: Best Picture, Best Director, Best Actor, Best Actress and Best Screenplay.