In "A Real Pain" (2024), the protagonists go to the airport in an old Mercedes taxi, but get out of an another newer one.
In "Goodfellas" (1990), a prop license plate falls off a parked car when Karen Hill is speeding away.
In "Catch Me If You Can" (2002), the Secret Service agent leaves his fingerprints on the evidence of the wanted man (no gloves), yet the FBI agent Carl Hanratty doesn't notice it.
In Hideaway (1995), you can clearly see Alicia Silverstone laughing and smiling during the car crash scene