I was delivering a pizza to an old apartment building in a bad area of town. When I pushed the button to call the elevator, the doors opened immediately. Suddenly, this woman ran out screaming with this crazy look on her face. She ran out of the building before I could say a word. Some people are just weird. I looked inside the elevator, just to check for scary murderers. Nope, nothing. But I still ended up taking the stairs.

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This riddle got me thinking can anyone answer it for me
I might have some guesses though.