I Test A Popular Urban Myth

I've always heard that if you throw a chair off of a skyscraper it will slice right through someone standing on the sidewalk, like a laser. Anyway, I tried it out on my lunchbreak earlier today. The building I work at is 100 stories tall, so I hauled my chair up to the roof and tossed it off. I yelled, "Wheee!!!", as the chair tumbled, struck the building a few times, and then flattened a car full of people below. So I guess that whole thing is false. Unless...wait, was it a chair or a penny that's supposed to do that? What...what have I done?