Holy Ghost

The bear trap Leti tip-toes around in the basement is a sad reminder that they were also used to catch runaway slaves.

When Leti breaks the glass of her white supremacist neighbors' cars, the glass instantly fractures into tiny, relatively safe shards, revealing that it is modern tempered glass.

No cars in 1955 had tempered windshields. In fact, the "safety" windshields of the time were designed to stay in one piece so that if a person were ejected through the windshield during an accident, the windshield would be knocked out rather than the person going through the windshield and suffering severe cutting injuries from the windshield breaking.

If the scene had been filmed with the glass that was available at the time, Leti would have had a much harder time breaking out the glass, and it would have broken into very large, potentially dangerous shards that may have injured her severely.