Its 1 a.m. and youre still out, stomach growling after too many drinks or too much walking. You spot the cart on the corner, steam rising thick into the cold night air, that little umbrella glowing yellow under the streetlights. The guy behind it barely looks up, just flips the hot dog on the grill, slaps it in a bun, squirts mustard and ketchup in one quick motion. 

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