$20 Becomes $50
At the strip club, Streebeck asks Joe for $20 to get a tip on a location. The very next scene, Friday's voiceover says, "After an outlay of $50 by me to one of his old informants."
You'd think either the director, the script supervisor, either of the lead actors, or even the screenwriter would have noticed the change in the amount.
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"She flattened a Dear John with a John Deere." - Douglas Wambaugh