Visible crew/equipment: Equipment is reflected in the window right before it shatters.
The Pride of the Yankees (1942)
1 visible crew/equipment mistake - chronological order
Directed by: Sam Wood
Starring: Gary Cooper, Walter Brennan, Teresa Wright, Babe Ruth
Revealing mistake: The ball Lou Gehrig hits that smashes a window doesn't come off his bat. It comes from behind him.
Lou Gehrig: Is it three strikes, Doc?
Clinic doctor: You want it straight?
Lou Gehrig: Sure, straight.
Clinic doctor: It's three strikes.
Trivia: At the end of the film Lou is seen walking off the field into the dugout. In truth after the speech, Lou had to be helped into the dugout and left the ballpark in a wheelchair.