The Wiz (1978)

Factual error: Dorothy tells Miss One that she lives at "433 Prospect Place." Dorothy is supposed to live in Harlem. Any New Yorker knows that there is no Prospect Place in Harlem. In reality, Prospect Place is in Brooklyn and is, in fact, where the street scenes for "Harlem" were filmed.

Scarecrow: Barnum said there's a sucker born every minute.
Tinman: I was there when he said it, but I never thought I'd be one of them.

Trivia: During the Munchkinland sequence, if you pay attention, you will notice that none of the very young Munchkins appear until the musical number starts. This was most likely to save shooting time, since children are not allowed to work for more than four hours a day.