Back when the NY subways used tokens, criminals would jam the slot and then suck out the token with their mouths. To discourage this, subway workers would put hot chili powder in the slots.
The New York City Subway still operates several train cars constructed in 1964 in regular service. This specific model owes its longevity to its superior durability, craftsmanship and structural quality. Retired cars from this model are shipped out to the Atlantic Ocean for artificial reefs