PITTSBURGH (KDKA) - I think we should do some science that gets dangerous with my coffee cup! Let me show you my setup. I tied my coffee cup to a string that was about 3 feet long. On the other end of ...

I tied my coffee cup to a string that was about 3 feet long. On the other end of the string, I tied some washers. Most people think the coffee cup will fall to the ground and break. However, when I ...